Best Backpacking Backpacks: Field-Tested & Trialed [2024 Update]

What differentiates a backpacking backpack from a large hiking backpack? Read on to find out and discover our selection of the best options out there for longer-term camping trips in the backcountry.

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Written by: | Reviewed by: Brian Conghalie
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Your backpack may be the most important piece of gear you’ll ever buy for a backpacking trip. Not only is this piece of kit going to be slung over your back for multiple hours each day, but it’s also tasked with ensuring the rest of your kit survives the trip in one piece.

In our extensive field testing, we’ve found the Osprey Atmos/Aura 65 to be the best overall backpacking backpack thanks to its excellent organization, comfort, and durability.

We’ll introduce you to a selection of the top backpacks on the market today, outline why we love the Osprey Atmos/Aura, explain what features you should consider when purchasing a new pack, and give you further tips on sizing and fitting.

Whether you’re taking on the John Muir Trail or heading on a weekend camping trip with the family, our list of our favorite backpacks for backpacking has something for you!

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Quick Recommendations

  • Editor’s Choice:  Osprey Atmos and Aura AG 65
    “A durable and supremely comfortable backpack that makes the most of its capacity with intelligent organizational features.”
  • Best Ultralight Backpack:  HMG 2400 Southwest
    “An extra-tough, minimalist backpacking pack that’s ideal for thru-hikes and ounce-counters.”
  • Best Value Ultralight:  Gossamer Gear Gorilla 50
    “A more affordable ultralight pack that boasts an impressive suspension system and a great feature set.”
  • Best Value:  Deuter Aircontact Lite 50+10
    “This lightweight backpack has all the fancy features we’d normally expect to find only on models that cost double its price.”
  • Best Budget Backpack:  Gregory Optic 48 & Octal 45
    “This option makes a few compromises in terms of ruggedness and organization, but offers great value for money and is surprisingly comfortable for the weight.”
  • Best Sustainable:  REI Co-Op Flash 55
    “This pack is made with bluesign-approved materials and provides strong competition for the market’s other – and far more expensive – UL backpacks.”
  • Best for Extended Hikes:  Osprey Aether AG 70 & Ariel AG 65
    “A burly, high-capacity backpacking pack with plenty of added features that boost convenience, versatility, and comfort.”
  • Best for Comfort:  Gregory Baltoro 65 & Deva 60
    “This pack’s awesome ventilation and plush padding make it the perfect pick for gear-intensive trips with heavy loads.”
  • Honorable Mention:  Osprey Rook 65
    “A watered-down version of our review’s winner (the Atmos), this pack is perfect for occasional backpackers who want a high-capacity pack with decent features without paying through the nose.”

What is the best backpacking backpack?

With decades of experience on the trail, we’ve shortlisted some of the best backpacking packs in our guide below.

  • Osprey Atmos and Aura AG 65
  • Hyperlite Mountain Gear 2400 Southwest
  • Gossamer Gear Gorilla 50
  • Deuter Aircontact Lite 50+10
  • Gregory Optic 48 & Octal 45
  • REI Co-Op Flash 55
  • Osprey Aether AG 70 & Ariel AG 65
  • Gregory Baltoro 65 and Deva 60
  • Osprey Rook 65

Osprey Atmos and Aura AG 65

Editor’s Choice

Weight: (Atmos): S/M: 4 lbs. 6 oz., L/XL: 4 lbs. 8 oz., (Aura): XS/S: 4 lbs. 4.7 oz., M/L: 4 lbs. 6 oz. ⸱ Capacity: 62 L, 65 L, 68 L ⸱ Materials: 210D & 510D nylon

The Osprey Atmos (click here for the women’s version the Aura AG 65) wins our vote as the best backpacking backpack out there because it strikes a perfect balance between toughness, compartmentalization, comfort, and weight.

While the Atmos is among the heaviest packs in our review, it performs so well in every other metric that we had no choice but to hand it our top spot.

The feature that sets the Atmos apart from its peers is the pack’s game-changing “Anti-Gravity” suspension system. Many packs out there use suspended spacer mesh in the rear panel, but this system goes one step further by covering your entire back – from the gear hauler strap at the top right down to the waist and hipbelt.

By creating a more extensive air channel between your back and the pack this system makes the Atmos one of the best-ventilated packs we’ve ever worn and superbly comfortable.

But this backpack’s got a lot more going for it than the suspension system alone. It’s also made with ultra-durable 210D and 510D nylon fabric, has a plethora of compartments and pockets, and has a fully adjustable harness and hipbelt to give you a more dialed-in fit.

At 4 lbs. 6 oz. for S/M or 4 lbs. 8 oz. for L/XL, the Atmos is the third heaviest option on our list after the Osprey Aether and Gregory Baltoro. However, much of that added weight goes towards the pack’s mightily impressive feature set, which includes an integrated rain cover, floating top lid, an internal FlapJacket for weather protection, curved zip access to both side panels, and removable dividers and straps.

  • PROs

    • Loads of pockets and compartments
    • Adjustable harness and hipbelt
    • Plenty of padding
    • Integrated FlapJacket protects contents from the rain
    • Hydration compatible
  • CONs

    • Slightly heavy

Bottom-Line: A slightly heavy but superbly comfortable option that boasts awesome organizational features and nigh-on unrivaled ventilation. Not only the best backpacking pack, but also the best camping backpack we tested.

Hyperlite Mountain Gear 2400 Southwest

Best Ultralight

Weight: 2 lbs. 0.2 oz. ⸱ Capacity: 40 L  ⸱ Materials: Dyneema composite (Black: 150-denier; white: 50-denier)

The HMG Southwest is the toughest pack we’ve ever tested and also one of the lightest, so scoops our award for best lightweight backpack and best ultralight backpacking backpack for off-trail adventures. Our testers lugged it on adventures that would have torn lesser packs to shreds, and each time it came through unscathed.

The Southwest’s toughness comes courtesy of its 100% Dyneema composite construction, which not only makes it able to deal with all kinds of rough treatment on the trails but also capable of carrying far heavier loads than nylon-made packs of the same size and weight.

The 2400 Southwest is also one of the lightest packs in our review, tipping the scales at a tiny 2.02 lbs. If you want to go even lighter, you can opt for the white colorway (1.88 lbs.) instead of the black, but the white version’s thinner materials mean doing so results in a hefty drop in ruggedness and durability.

Compared to other packs on our list, the Southwest is a very basic affair. It has minimal back padding, one large main compartment, and only three pockets, two of which are on the hipbelt. However, given the pack’s intended end use of ultralight backpacking or thru-hiking, it would feel harsh to hate on it too much for sticking (pretty much perfectly) to its bottom line.

In a head-to-head with our list’s other ultralight pack, the Gossamer Gear Gorilla, the Southwest is a little heavier despite having a lower capacity. We also found the Gorilla’s more substantial padding made it a more comfortable carry with heavier loads, while its extra storage options made it more convenient. The Southwest, however, is more durable by far.

  • PROs

    • Lightweight
    • Waterproof
    • Tough as nails!
    • External storage
    • Hydration compatible
  • CONs

    • Dyneema fabric lacks breathability
    • Pricey
    • Minimal back padding

Bottom-Line: An incredibly lightweight, robust, and waterproof pack that’s built to withstand the roughest treatment.

Gossamer Gear Gorilla 50

Best Value Ultralight

Weight: S: 1 lb. 12 oz., M: 1 lbs. 13.8 oz., L: 1 lb. 15.4 oz. ⸱ Capacity: 50 L ⸱ Materials: 70 & 100D Robic nylon

The Gossamer Gear Gorilla 50 is the best value ultralight backpack in the business, period. It’s featherlight, tough, surprisingly comfortable, and boasts great organizational features. For ounce-counting minimalists on a tighter budget, it doesn’t get any better than this.

This Gorilla weighs just under 2 pounds but offers 50 liters of interior storage in addition to 5 generously sized exterior pockets – one kangaroo pocket, two hip belt pockets, and two huge water-bottle pockets. It also has plush padding in the shoulders and the back panel, and if you want to go even lighter, the internal frame and rear cushioning can be removed.

Compared to our favorite ultralight pack, the HMG 2400 Southwest, the Gorilla is less durable. While its 70/100D Robic nylon fabric will be plenty burly for gentler adventures and more careful users, the Southwest’s Dyneema construction makes it a better choice if you’re prone to treat your backpacks to a fair share of rough and tumble on the trail.

The Gorilla, however, is also much cheaper. Those extra storage options and all that cushioning also make it a better option if comfort and convenience are higher on your list of priorities than toughness and longevity.

  • PROs

    • Ultralight
    • Unisex harness
    • 5 large exterior pockets
    • Hydration compatible
    • Removable internal frame
    • Includes a SitLight pad and a removable stay
  • CONs

    • Not as water-resistant or durable as HMG 2400 Southwest

Bottom-Line: A 50-liter ultralight backpacking pack that’s comfortable and blessed with ample storage options to boot. The best internal frame pack out there (primarily because the frame can be removed!).

Deuter Aircontact Lite 50+10

Best Value

Weight: 3 lbs. 14 oz. ⸱ Capacity: 60 L ⸱ Materials: 330/250D polyamide and 600D polyester with a PU coating

The Deuter Aircontact Lite is the best backpacking pack available for hikers looking for a mid-range option that does most of what its pricier peers do, minus a few bells and whistles.

This 60L backpack has a more streamlined design than other backpacks we tested, weighs a relatively lightweight 3 lbs. 14 oz., and is surprisingly tough for such a light pack. It also has a wealth of interior and exterior storage options and effective load transfer features that enhance comfort when you’re carrying extra gear.

The Aircontact is more expensive than the Gregory Optic, REI Co-Op Flash 55, and Osprey Rook, our other value picks, but it’s made with burlier materials than the Optic and Flash 55 and has a wider and more sophisticated array of features than the Osprey Rook.

The Aircontact boasts a similar set of organizational features to the Osprey Atmos. It has a large sleeping bag compartment, an elasticated inner compartment, 2 hipbelt pockets, a large stretch-mesh pocket on the front, an expandable top lid, mesh side pockets, helmet holder loops, and ice tool attachments.

The Atmos’ Anti-Gravity suspension system, however, makes it a far more comfortable carry, even if the Aircontact’s X-Frame load-distribution system is fairly impressive for such a reasonably priced pack.

The only way in which the Aircontact lets itself down is in the padding in the shoulders and rear panel, which is a little too thin for all-day comfort with loads over around 45 pounds.

  • PROs

    • Affordable
    • Tough materials
    • High capacity
    • Front “kangaroo” pocket
    • Removable top lid serves as a 10L daypack
  • CONs

    • Only available in one size
    • Back panel padding less substantial than in other models

Bottom-Line: A well-designed backpacking rucksack that boasts most of the fancy features we’d only expect to find on models that cost double its price.

Gregory Optic 48 & Octal 45

Best Budget

Weight: (Optic) S: 2 lbs. 6 oz., M: 2 lbs. 7.5 oz., L: 2 lbs. 10 oz., (Octal) 2lbs. 4 oz. ⸱ Capacity: S: 45 L, M: 48 L, L: 51 L ⸱ Materials: 100D/210D HD tenacity nylon

The Gregory Optic (women’s version Octal) is the best budget backpack we tested. This is a great backpack for buyers looking for an affordable, lower-capacity pack for a weekend or shorter multi-day trips in the wilds.

There are plenty of great budget packs out there, but this one won our testers vote for best budget backpacking backpack because it makes the fewest compromises. The Optic weighs just 2 lbs., 7.5 oz. (medium), making it a fraction lighter than the REI Co-Op Flash 55 and more than a pound lighter than the similarly priced Osprey Rook and Deuter Aircontact Lite.

Compared to these other low-cost packs, the Optic is also a more comfortable carry thanks to its AeroSpan suspension, dual-density FocusForm shoulder harness, and nicely padded supportive hipbelt. It also boasts a pair of large hip belt pockets and an integrated rain cover – features that are far from standard in UL packs or packs in this price range.

The Optic’s lack of a sleeping gear compartment and zippered side pockets mean it’s less than ideal if you’re the type of backpacker who likes to keep things neat and tidy. Its 100D/210D nylon construction and fairly flimsy buckles, moreover, make it one of the least rugged packs in our review.

Nevertheless, if you’re looking for the best lightweight backpack for buyers on a budget, this one’s impressive suspension and surprising comfort levels make it a serious contender.

  • PROs

    • Lightweight
    • Tough for such a lightweight pack
    • Affordable
    • Hydration compatible
    • Comfortable
  • CONs

    • Short on pockets/compartments
    • Small, fiddly buckles

Bottom-Line: A fairly basic but very well-made option with an integrated raincover, made with reasonably tough materials, and most – but not all – desirable features.

REI Co-Op Flash 55

Best Sustainable

Weight: S: 2 lbs. 9 oz., M: 2 lbs. 10 oz., L: 2 lbs. 11 oz. ⸱ Capacity: S: 53 L, M: 55 L, L: 57 L ⸱ Materials: 100D ripstop nylon main body & 420D nylon bottom

The REI Co-Op Flash 55 is one of the lighter mid-capacity options on our list, and the best sustainable backpack in the business due to its use of bluesign-approved materials.

The design of the Flash 55 has undergone a bit of a makeover. There are now four large external pockets, a handy roll-top closure, and a handful of removable features (the top lid, shoulder strap pocket, hip belt pockets, and compression straps) that let you trim weight down further when need be.

Despite cutting the weight of the Flash down to just 2 lbs. 10 oz., our testers found it more comfortable than ever before, even when you’ve maxed out the 30-pound recommended load capacity.

Compared to our review’s other UL packs, the GG Gorilla and HMF Southwest, the Flash is heavier and slightly less durable. However, we found its suspension system and plush padding make it a more comfortable carry and its organizational features are far superior.

The only real downside to the Flash is the limited adjustability – because the straps and hip belt are fixed in place, there’s less scope for achieving a dialed-in fit.

  • PROs

    • Lightweight
    • Reinforced bottom
    • Comfortable
    • Ample storage options
    • bluesign-approved materials
  • CONs

    • Limited adjustability
    • Heavier than other UL packs

Bottom-Line: A comfortable, ultralight option with superior storage to most of its UL peers.

Osprey Aether AG 70 & Ariel AG 65

Best for Extended Hikes

Weight: (Aether) S: 5 lbs. 1.4 oz., M: 5 lbs. 2.2 oz., L: 5 lbs. 3 oz., XL: 5 lbs. 3.8 oz., (Ariel) XS: 4 lbs. 10.5 oz., S: 4 lbs. 13.3 oz., M: 4 lbs. 14 oz., L: 4 lbs. 14.8 oz. ⸱ Capacity: (Aether) S: 67 L, M: 70 L, L: 73 L, XL: 76 L, (Ariel) XS: 59 L, S: 62 L, M: 65 L, L: 68 L ⸱ Materials: 210D nylon dobby & 500D nylon packcloth

The Osprey Aether (click here for the women’s version the Ariel AG 65) is our go-to backpacking backpack for longer multi-day trips when we want a little more in the way of comfort and convenience than a UL pack can offer.

At 5 lbs. 3 oz. (large), this 70L backpack is the heaviest model we tested, a couple of ounces heavier than the Gregory Baltoro and 11 oz. more than the Osprey Atmos. However, it has 5 more liters of storage space than both these packs and is a fraction cheaper than the Baltoro.

Like the Atmos, the Aether scores very highly in the comfort stakes owing to its use of Osprey’s Anti-Gravity ventilated mesh back panel, which we found provided a more precise fit by contouring to the shape of our body and centering the weight over our hips. The harness is also fully adjustable and a “Fit-on-the-Fly” hip belt allows for further fine-tuning.

Storage-wise, the Aether is a bit of a dream.

In addition to a huge central compartment, there’s a zippered sleeping gear compartment, ice tool loops, Stow-on-the-Go trekking pole attachments, a hydration reservoir sleeve, dual front panel zippered pockets for easy-access storage, a huge kangaroo pocket, dual-access water bottle pockets, and zippered front access to the main compartment.

A few additional, non-standard features also give you the option of lightening the pack’s weight and make the Aether a little more versatile – namely, a removable divider in the sleeping bag compartment, removable sleeping pad straps, and a floating lid that can be whipped off and deployed as a daypack.

  • PROs

    • Large capacity – ideal for bulky gear and longer trips
    • Tough
    • Comfortable
    • Lid converts into a daypack
    • Built-in raincover
  • CONs

    • Heavy

Bottom-Line: While a little too heavy and pricey for some, the Aether’s huge capacity, excellent organization features, and tough build make it ideal for long-term backcountry travel.

Gregory Baltoro 65 and Deva 60

Best for Comfort

Weight: (Baltoro) S: 4 lbs. 10.4 oz., M: 4 lbs. 13.4 oz., L: 5 lbs. 2 oz., (Deva) XS: 4 lbs. 7.7 oz., S: 4 lbs. 9.8 oz., M: 4 lbs. 13.3 oz. ⸱ Capacity: (Baltoro) S: 62 L, M: 65 L, L: 68 L, XL: 76 L, (Deva) XS: 46 L, S: 50 L, M: 60 L ⸱ Materials: 210D Honeycomb CryptoRip & 210D high-tenacity nylon

The Gregory Baltoro (women’s version the Deva 60) has been one of our favorite backpacking packs for several years. It’s tough, well-thought-out, and so comfortable that it’s almost a pleasure to wear, even when carrying a full load.

The Baltoro uses a Rotating Load Transfer Disc that allows the hip belt to pivot and enables it to conform to your natural movements for enhanced agility and stability. This does an excellent job of distributing the load weight and makes hiking on bumpy trails and in trickier terrain a lot easier.

The Baltoro also features a grid-lock system that allows you to adjust the straps either vertically or laterally for a custom fit that will conform to most body shapes.

The Baltoro’s organization is peerless. In addition to a wide opening and spacious main compartment, it boasts a large front pouch, a huge U-shaped zipper panel that lets you access your gear from any side, two external top lid pockets, and side zipper pockets for water bottles, cameras, or even a bear canister.

The removable hydration sleeve also converts into a daypack with shoulder harnesses and an accessory pocket.

This compartmentalized design not only helps to keep things tidy and provides easy access to your gear, but it also stabilizes the load by encouraging even weight distribution and centering your load in the optimal position.

Compared to the other heavier backpacks on our list, the Osprey Atmos and Aether, the Baltoro’s slightly less durable and a fraction more expensive, but also a little more comfortable when lugging heavier loads.

  • PROs

    • Zippered front access
    • A very comfortable pack, even with a heavy load
    • Roomy enough for 5+ days’ backpacking kit
    • Fully adjustable
    • Removable hydration sleeve converts into a daypack
  • CONs

    • Quite heavy

Bottom-Line: A hard-wearing, trail-ready option that goes the extra mile in terms of comfort and convenience. A contender for best multi-day backpack.

Osprey Rook 65

Honorable Mention

Weight: 3 lbs.6 oz. ⸱ Capacity: 65 L⸱ Materials: 600D polyester & 1000D nylon

The Osprey Rook 65 is one of the best backpacks available if you want a more affordable version of the Atmos – it’s the cheapest option on our list and ideal for occasional backpackers.

The Rook is essentially a pared-down version of our review’s winner, the Osprey Atmos. If you’re a “cup half empty” kinda person, then this pack’s lack of Anti-Gravity suspension and dearth of storage options will make the Rook seem a poor cousin. If you’re a “cup half full” kinda person, then its favorable price tag, lighter weight, and comparable burliness and capacity make it a bargain.

The Rook is the most affordable option on our list, costing less than even our top budget pick, the Gregory Optic. Compared to the Optic, the Rook is a far more durable and rugged pack owing to its super-burly 600D and 1000D fabric, and also offers an extra 14 liters (large version of the Optic) of storage.

On the downside, the Rook’s fairly rudimentary suspension system and light padding meant it felt less comfortable in testing when we were carrying loads over 25 pounds. It also weighs almost a whole pound more than the Optic.

If you’re wavering between the two, then the Optic’s a better choice for ultralight backpacking but the Rook’s a great alternative if you want a little extra space and a tougher, more durable pack.

  • PROs

    • Cheap!
    • Incredibly robust
    • Integrated raincover
    • Adjustable harness
  • CONs

    • Less comfortable with heavy loads
    • Lacks storage options
    • Only one size available

Bottom-Line: A basic but extremely tough, well-made pack that’s ideal for buyers who are happy to compromise on comfort and features to maximize value for money.

Backpack Comparison Table

Product NameWeightCapacityMaterialsFrame
Osprey Atmos And Aura AG 654 lbs. 6 oz. (Aura M/L)65 L210D & 510D nylonAnti-Gravity
Hyperlite Mountain Gear 2400 Southwest2 lbs. 0.2 oz.40 LDyneema compositeFrameless
Gossamer Gear Gorilla 501 lbs. 13.8 oz.50 L70 & 100D Robic nylonInternal frame
Deuter Aircontact Lite 50+103 lbs. 14 oz.60 L330/250D polyamide, 600D polyester with PUX-Frame
Gregory Optic 48 & Octal 452 lbs. 7.5 oz. (Optic M)48 L100D/210D HD tenacity nylonAeroSpan suspension
REI Co-Op Flash 552 lbs. 10 oz.55 L100D ripstop nylon, 420D nylonInternal frame
Osprey Aether AG 70 & Ariel AG 655 lbs. 2.2 oz. (Aether M)70 L210D nylon dobby, 500D nylon packclothAnti-Gravity
Gregory Baltoro 65 And Deva 604 lbs. 13.4 oz. (Baltoro M)65 L210D Honeycomb CryptoRip, 210D high-tenacity nylonRotating Load Transfer Disc
Osprey Rook 653 lbs. 6 oz.65 L600D polyester, 1000D nylonStandard suspension

Top Choices by Category

Budget: Gregory Optic 48/Octal 45, Osprey Rook 65, and R.E.I. Flash 55
Lightest: HMG 2400 Southwest and Gossamer Gear Gorilla 50 
Most comfortable: Osprey Atmos AG 65/Aura AG 65, Osprey Aether AG 70/Ariel AG 65, and Gregory Baltoro 65/Deva 60

How to Choose a Great Backpacking Bag?

Choosing the right trekking backpack for you can be a little tricky, so we’ve provided the most important things for you to consider when buying below.

  • Recommended Capacity
  • Comfort & Torso Fit
  • Suspension
  • Weight
  • Organization
  • Ventilation
  • Durability

Recommended Capacity

To determine the capacity of backpack you need, it’s a good idea to first consider the following:

  • The length of your trip (in days)
  • The kind of gear you’ll be carrying
  • What season you’ll be traveling in 

Our recommended backpacking backpack capacities based on the length of trip can be found in the table below.

Length of Trip

Pack Volume
Single Day/Overnight (1-2 nights)20 – 30
Weekend (2-3 nights)30 – 50
Multi-day (2-5 nights)45 – 55
Extended (5+ nights)55+

There are, however, a few variables to take into account. Because winter gear is than the warm-weather kind, choose a pack that’s roughly 10-15% bigger for cold-weather excursions. 

If you’re traveling with kids or carrying kit for fishing, slacklining, or gear-intensive activities like climbing or mountaineering, then choose a pack at the upper end of the ranges listed above. This also applies if you’re the type of camper who likes to carry a few luxury items as opposed to a bare-bones minimalist. 

If you’re unsure, there’s one easy way that will help you gauge the capacity you require. 

Grab all the gear you’ll need for your trip and lay it out on the floor. Next, throw all of the gear into a 40, 50, or 60-liter trash bag, duffel, or old backpack, and use this to measure what size pack you’ll need.

If in doubt, we recommend opting for a model with a slightly higher capacity than you think you’ll need – the weight penalty will be negligible and you can always cinch down the compression straps to consolidate your load if the pack’s not full. 

backpack side pockets
If unsure, size up and if you need less room simply cinch your backpack using the various compression straps.

Comfort & Torso Fit

Capacity aside, comfort and fit are the two most important things to consider when choosing a backpack. Comfort depends primarily on two things – the quality of the padding and how well the pack fits.

For maximum comfort, the padding on your pack’s rear panel and shoulder straps should be substantial. Chunkier padding helps to limit pressure on your shouder and protects your back against the contents of your pack. Ideally, the back panel should have air channels that allow air to circulate between the pack and your back. This will help to prevent yout back becoming soaked in sweat.

An ill-fitting backpack is sure to become an instrument of torture just a short way down the trail. This is mainly because an imperfect fit will place too much of the load on your shoulders as opposed to your hips. 

The proper fit will ensure that the load is distributed in an 80/20 ratio, with the majority of your load squarely on your hips and lower body, only 20% on the front of your shoulders, and no weight on the top of your shoulders. 

Hiker helping another hiker put on heavy backpack
The golden ratio of weight distribution is 80% on the hips and 20% on the shoulders.

This ratio means the bulk of the pack’s weight will rest on the stronger lower body rather than the weaker muscles of the torso and shoulders. 

To get the right fit, measure the length of your back from the C7 vertebrae at the base of your neck to the center point of your spine between the tops of your hip bones. This spot is called the iliac crest, and it is where you should be carrying most of your pack’s weight. Compare this measurement to the measurements listed with any potential purchase.

Whichever pack you ultimately choose, it’s unlikely that the fit will be just right, even if the pack is sold in 2 or 3 different sizes. For this reason, it’s a good idea to choose a pack with an adjustable torso length so you can customize the fit to your specific body shape. 

In our review, the following packs have adjustable torso lengths: Osprey Atmos/Aura, Gregory Baltoro, Deuter Aircontact Lite, Osprey Rook, and Osprey Aether/Ariel.

backpacker with Osprey backpack walking through forest
All of the Osprey backpacks on our list come with adjustable torsos.


A backpack’s “suspension system” is a vital consideration when choosing. The suspension system consists of all the parts that connect the pack to your body and support the load – the shoulder straps, load lifter straps, hipbelt, sternum strap, and back panel. Below, we’ve added a short overview of the desirable qualities to look for in each of these features. 

Shoulder Straps

Although a pack’s weight should be distributed so that only 20% rests on the shoulders, 20% of 15, 25, or 50 pounds can become mightily uncomfortable if the shoulder straps on your pack don’t have sufficient padding.

To save yourself from sore shoulders, we recommend choosing a backpacking pack with thick foam padding and wider straps that distribute the weight more evenly across the breadth of the shoulder instead of digging into your skin.

Hip Belt

On a well-fitted backpack, around 80% of the weight of the pack will be supported by your waist. For this reason, an adjustable and padded hip belt is hugely important.

Backpacker with backpack with padded hip belt on sitting on the beach
With 80% of the backpack weight sitting on your hips, padded hipbelts are a must.

Wider hip belts are more comfortable than narrower ones, which can cause chafing or cheese-wire your midriff when carrying heavy loads. Because the hips tend to be sweaty, hip belts with mesh panels that increase airflow are a better bet if you plan on doing most of your hiking in warmer temps.

Load-Lifter Straps

Load-lifter straps are found at the top of the shoulder straps and are there to prevent the top of the pack from pulling away from your body. When adjusted correctly they should form a 45° angle between your shoulder straps and the pack, which should help keep the pack snug against your upper back. 

Because this feature is so fundamental to load distribution, we wouldn’t recommend buying any backpacking pack that doesn’t have ‘em (something that’s more common in hiking backpacks with large enough capacities to serve as a weekend backpack).

Back Panel

This should use contoured foam padding or a mesh suspension panel to provide comfort and necessary airflow. Ultralight backpacks like the HMG Southwest, however, often do away with back panel padding in order to save on weight. This naturally results in a significant drop in comfort and also means you have to pack carefully to avoid hard gear items from poking into your back.

Close up of hikers backpacks
The extent of back panel padding will dictate the comfort of the pack.

It’s worth bearing in mind that no matter how plush the padding on the back panel, straps, or hipbelt, no pack is going to be a comfortable carry if the fit isn’t right. For this reason, choosing a pack with an adjustable harness/suspension is the way to go.

female hiker in leggings walking through canyon
Thru-hiking or multi-week backpacking? If so you may want to take the ultralight option.


When choosing a new backpack, the weight of the pack is a key factor to consider.

In all but a few cases, there is a direct correspondence between the weight of the backpack and the weight of the load it can carry. To give you a ballpark idea of the load weight that different weights of pack can usually carry, take a look at the following: 

  • 2-3 lb. pack weight = 15-30 pounds of gear
  • 3-5 lb. pack weight = 30-50 pounds of gear
  • 5+ lb. pack weight = 40-70 pounds of gear

While a lighter pack equals a lighter overall load, lighter packs often scrimp on some of the desirable features found on heavier models. Ultralight packs, for example, often have much less padding in the back panel and shoulder straps, and/or forego convenient features like pockets, compartments, or wide, comfortable hipbelts.


Internal and external organization features are important considerations when choosing a pack and can vary significantly from one pack to another. Below, we’ve added a list of the following features and what they’re good for.

  • Front Access
  • Extendable Top Lids
  • Hip Belt Pockets
  • Gear Loops
  • Shoulder Strap Pockets
  • Front Mesh Pocket
  • Compartments for Sleeping Bags
  • Compression straps
  • Water bottle pockets

Front Access

Most backpacks’ central compartments are accessed via a large top opening that is sealed and secured with a drawstring and buckle-down lid. Other packs, however, also have a front or side zipper, which lets you access gear in the main compartment of the pack body more easily and without having to empty out all the contents.

Extendable Top Lids

A few packs (the Osprey Atmos, Osprey Aether, REI Flash, and Deuter Aircontact Lite) use an extendable lid that allows you to increase storage by cramming in gear at the top of the pack. 

Hip Belt Pockets

These non-standard features are useful for storing your phone, camera, and other small items you want to keep accessible.

Gear Loops

Useful for attaching ice axes or trekking poles.

backpacking backpack and trekking poles sitting in forest
Extra gear loops and external pockets are handy for attaching larger or regularly used items.

Shoulder Strap Pockets

Ideal for storing sunglasses or a GPS device.

Front Mesh Pocket

Aka “kangaroo pockets,” these provide plenty of room for bulkier items like sandals or gas canisters and are also handy for drying out wet gear.

Compartments for Sleeping Bags

These let you keep sleeping equipment separate from your other gear and also provide easier access to kit at the bottom of the pack. 

Compression Straps

These help to reduce bulk and stabilize your load for enhanced weight distribution and comfort. The straps can also be used to attach longer items like tent poles or camping chairs to the pack’s exterior.

Water Bottle Pocket

Most packs have these pockets but the design of some is better than others – the most convenient are slanted forward for easy, on-the-go access.

The more vertically aligned a water bottle pocket is, the harder it is to remove whilst hiking.


Poorly ventilated backpacks can lead to a lot of discomfort, so ventilation is another inportant factor to consider when choosing your pack.

A well-ventilated backpack is one that permits ample airflow around the back panel and the waist, thus preventing you from becoming soaked in sweat when in warmer conditions or hiking hard. 

Ultralight packs offer the least ventilation of the bunch. This is because they typically do away with plush foam padding on the back panel to keep weight to a minimum, as with the HMG 2400 Southwest and, to a lesser extent, the Gossamer Gear Gorilla. 

More substantial packs usually use one of two systems to encourage airflow: 

  • A molded foam back panel with air channels that help air circulate around your back (Deuter Aircontact Lite, REI Co-Op Flash) 
  • Offset, suspended mesh panels that create a gap between the pack and your back (Osprey Atmos/Aura, Osprey Aether/Ariel, Gregory Optic, Gregory Baltoro, Osprey Rook).

All of our testers preferred suspended mesh, which is the best option if you tend to run hot or you’re hiking in summer because it creates a more sizable channel for fresh air to circulate and for your sweat to escape. 

Water beading on material surface due to DWR treatment
A DWR-treated exterior will cause any water to ‘bead up’ on the surface rather than soak through it.

Other Features

  • Hydration Compatibility – Many backpacking packs have an internal sleeve for storing a water bladder and a port for the drinking hose – handy if you like to hydrate on the go.
  • Removable Top Lid – Some packs have top lids that can be detached and used as a day pack. This is useful if you’re base camping and want to take on a few side hikes without having to empty (and then lug) your main pack.
  • Waterproofing – Most packs use densely knitted fabrics that will block out light rain showers, but an integrated rainfly will cover the entire pack and protect your backpacking gear if things take a turn for the torrential. The only waterproof pack we tested is the HMG 2400 Southwest, which has a main compartment made with 100% waterproof Dyneema Composite Fabric.Packs that come with an integrated rain cover are the Osprey Aether/Ariel, Gregory Baltoro, Osprey Rook, and Gregory Optic. The REI Flash 55 uses a seam-sealed water-resistant lining in the lid and the Osprey Atmos and Aether have both a hydrophobic coating and an Integrated FlapJacket that protects the pack’s contents from precipitation.

The Best Backpacking Pack: The Verdict

Out of all the backpacking backpacks we tested, the Osprey Atmos 65/Aura 65 was our runaway winner. Despite its heavier weight compared to most other packs on our list, it stands out due to its super comfortable suspension system, oodles of organizational pockets, and dialed-in fit.

If you are more of an ultralight backpacker or thru-hiker then we recommend either the super light HMG 2400 Southwest or Gossamer Gear Gorilla 50, both will substantially lighten your load. And if you need something on the more affordable end of the spectrum we love the value for money of the Gregory Optic 48/Octal 45, Osprey Rook 65, and R.E.I. Flash 55.

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Last update on 2024-05-22 / Affiliate links / Images from Amazon Product Advertising API

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Kieran Avatar

Kieran James Cunningham is a climber, mountaineer, and author who divides his time between the Italian Alps, the US, and his native Scotland.

He has climbed a handful of 6000ers in the Himalayas, 4000ers in the Alps, 14ers in the US, and loves nothing more than a good long-distance wander in the wilderness. He climbs when he should be writing, writes when he should be sleeping, has fun always.

Kieran has taught mountaineering, ice climbing, and single-pitch and multi-pitch rock climbing in a variety of contexts over the years and has led trekking and mountaineering expeditions in the Alps, Rockies, and UK. He is currently working towards qualifying as a Mountaineering and Climbing Instructor and International Mountain Leader.

Kieran’s book Climbing the Walls—an exploration of the mental health benefits of climbing, mountaineering, and the great outdoors—is scheduled for release by Simon & Schuster in April 2021.

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