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Fast, light, durable pack for weekend backcountry trips.

When you find yourself strapping your sleeping bag, cook pot, and tent poles onto the outside of your daypack, it's time to invest in the Arc'teryx Men's Altra 50 Backpack. This pack provides enough gear space for one, two, or three nights of quiet bliss in the backcountry, and the C² suspension system helps keep weight to a minimum while boosting comfort and support.

  • C² (composite construction) system's minimized construction lamination decreases pack weight and makes the pack sit close to the body, which minimizes load movement and backward pull and increases energy conservation
  • Ergonomically shaped shoulder straps feature 500D nylon with silicone-treated PU fabric for durability and protection, a Hypercell foam for stability and comfort, and SpacerMesh lining for airflow
  • Twin 6005 T-6 extruded aluminum M-bar stays are rigid and lightweight to provide structural support
  • Back panel consists of HD 80 foam for support and structure and burly double-weave fabric offers strength and durability
  • Altra 50L is available in short, regular, and tall
  • Two vertical-zippered access points offer easy access to your gear
  • Extendable top lid and extension collar enable you to carry larger loads for three nights in the backcountry or for just a weekend
  • Body fabric consists of 210D nylon ripstop fabric coated with silicone to shed moisture and provide durability and tear-resistance
  • 500D nylon silicone-treated PU fabric in high-wear areas supplies extreme durability and resists dirt, snow, and water pick-up
  • Extension collar features 100D nylon mini ripstop fabric that has incredible tear resistance and a silicone coating that sheds moisture
  • Hydration compatible (bladder not included) with a hydration sleeve external access point for convenience
  • Wingman pockets make it easy to grab your camera or headlamp one-handed
  • Double-chamber top lid organizes your gear
  • Large front kangaroo pocket stashes frequently used items while an internal security pocket holds your keys, phone, or wallet
  • Dual P'ax ice tool carry system enables one-handed access to your tools

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Arc'teryx Altra 50 Backpack - Men's - 2867-3233cu in

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Here's what others have to say...

Can this work as carry-on and fit in the overhead cargo on plane?

Responded on


Depending on the airline you're flying with you'll have a different bag restrictions. Here are a few major air lines and their respective carry on size limitations compared to this pack:
(All in inches)
Delta Air Lines 22 x 14 x 9
Southwest Airlines 24 x 16 x 10
American Airlines 22 x 14 x 9

Unfortunately this pack will be too big for those dimensions.

The length will be too big.

Shoot me an email anytime you have questions!

Jared D.
Expert Gearhead

2 5

Disappointed as well

  • Familiarity: I've put it through the wringer

The pack itself is made of high quality materials, and the pack body is very well done. The usual from Arc'teryx.

Conversely and unfortunately, the suspension isn't worthy of a pack that can be extended to 58L in the Large. The hipbelt supports no weight, so expect to carry all of your load on the shoulders.

An upgrade to the suspension and this pack would be a real winner for lightweight packers on weeklong trips.

Responded on

i completely agree-I used one of these and it was not really builit for heavy loads but fast packing. So, I went to ebay and found a Bora 50 near new. Love my bora-cant really beat the suspension of the waistbelt of the bora. I wish they would take the bora waistbelt and put it on an pivot like the altra.

2 5

Massively disappointed

  • Gender: Male
  • Familiarity: I've used it several times

I had such incredible high hopes for this pack. But it appears that in a rare misstep, the arcteryx folks have lost the plot on packs in this size range.

The pack itself is clean, well thought out and lightweight. The suspension, if you can even call it that, is a joke. The hipbelt doesn't even deserve the name, it is so incredibly thin and flimsy. Zero weight transfer. I know arcteryx is all about elite atheletes who apparently like pain and carrying 58 Liters of gear (full expanded size of this pack in a Tall) all on their shoulders, but that kind of elitism is getting a bit rampant up at arc HQ.

From the company who once understood that competent suspensions are part of 50-55L packs, this is a dismal failure. The new Gregory Contour 50, the Deuter 50 ACT, those are packs that can comfortably carry 35, 40, even 45 pounds ON YOUR HIPS. You know.. where the weight should be.

This pack... gets returned. I give it two stars because aside from the laughable suspension, the pack design is quite good.

Responded on

A lot of newer packs skimp on the suspension which is the most important part of a pack if you want to carry 40 lbs more than one mile. I am guessing that the strategy is to incorporate a lot of bells and whistles like extra zippers, external pockets, sleek profiles, fancy ice axe carrying systems, extendable and removable hoods .. etc .. the fancy features attract buyers and the lite suspension keeps the weight, bulk, and cost down. Manufacturers are also thinking that most weekend warriors seldom go more than one mile away from the car and they work 50 weeks a year and have the $$$ to afford fancy packs.