• Online:
  • URL for this product:
  • From the U.S. and CanadaCall 1-800-426-4840
  • Mon. through Sun., 4 a.m. through 11 p.m. PT.
  • InternationalCall 1-253-891-2500
  • Mon. through Sun., 4 a.m. through 11 p.m. PT. English language only.
Osprey Atmos 50 Pack


    Osprey Atmos 50 Pack

    The Osprey Atmos 50 pack redefines expectations for weight, ventilation and comfort. An updated suspension provides a customized fit for greater comfort than ever on the trail. See details

    • $209.95

    Item # 828428

    REI Members get back an estimated $ 21.00 on this item as part of their annual member refund.

    The REI Member Dividend

    The REI dividend is a unique benefit of membership in the REI co-op. It's comprised of your member refund—typically 10% back on eligible purchases—and/or your REI Visa® card rebates.

    Each March, active REI members and REI Visa cardholders who earned a rebate receive a refund in the form of an annual dividend notice.

    Only active members receive annual dividend notices. To maintain your active status as an REI member, you need to make net merchandise or shipping purchases of at least $10 per year, unless you joined that year. Member numbers are issued in one name and only that person receives the member refund. Your number can be used by others in your family, but it cannot be transferred to someone else.

    Questions? Call us at 1-800-426-4840 for more about your dividend or its redemption.

    Learn more

    The Osprey Atmos 50 pack redefines expectations for weight, ventilation and comfort. An updated suspension provides a customized fit for greater comfort than ever on the trail.

    Product size and color

    The Osprey Atmos 50 pack redefines expectations for weight, ventilation and comfort. An updated suspension provides a customized fit for greater comfort than ever on the trail.

    • 100% Satisfaction Guaranteed
    • Gear and Advice You Can Trust

    This item ships for free! Learn more

    To view videos or use the zoom feature on REI's websites, please download the latest version of Adobe Flash Player.


    The Osprey Atmos 50 pack redefines expectations for weight, ventilation and comfort. An updated suspension provides a customized fit for greater comfort than ever on the trail.

    • Updated AirSpeed™ suspension offers fully adjustable torso length and adjustable hipbelt fit
    • Shoulder harness adjusts over a 3 in. range for fine-tuned fit; new pad design with spacer-mesh contact surfaces and ventilated foam provides breathable, supportive cushioning
    • Hipbelt uses dual-density foam for improved support and spacer mesh for breathability; exclusive adjustment system lets you customize the fit while wearing the pack
    • Hipbelt pads extend up to 3 in. on each side for 6 in. total adjustment range
    • LightWire™ alloy frame creates low-profile air space, optimizing balance and ventilation; 3D tensioned mesh back panel ensures excellent breathability and supportive fit
    • Large main compartment contains a hydration sleeve and reservoir clip (reservoir sold separately)
    • Floating top lid features a large pocket and an under-the-lid mesh pocket
    • Front stretch woven pocket, side stretch-mesh pockets, zippered hipbelt pockets and 2 large front zippered pockets help organize gear for quick, convenient access
    • Pack exterior features removable sleeping pad straps, Stow-on-the-Go™ quick stash trekking pole attachment system and dual ice axe loops with bungee tie-offs
    • The Osprey Atmos 50 pack is made with a lightweight yet strong 210- and 100-denier fabric set that offers excellent durability and less trail weight than heavier fabrics


    Item 828428

    Members: earn a
    $20 bonus card

    When you spend $100 April 14—29

    Single-use bonus card redeemable by
    REI members MAY 2—12, 2014.

    Not a member? Join Now!
    Add to Cart

    REI Membership

    View specs for sizes: S, M, L

    Osprey Atmos 50 Pack Specs
    Best use
    Lightweight backpackLightweight backpackLightweight backpack
    47 liter50 liter53 liter
    2,868 cubic inches3,051 cubic inches3,234 cubic inches
    3 lbs. 1 oz.3 lbs. 2 oz.3 lbs. 4 oz.
    1.39 kilograms1.42 kilograms1.48 kilograms
    16 - 19 inches18 - 21 inches20 - 23 inches
    25 - 35 inches28 - 38 inches33+ inches
    High-tenacity nylon/mini-ripstop nylonHigh-tenacity nylon/mini-ripstop nylonHigh-tenacity nylon/mini-ripstop nylon
    Metal alloyMetal alloyMetal alloy
    1 peripheral hoop1 peripheral hoop1 peripheral hoop
    8 + main compartment8 + main compartment8 + main compartment
    Frame type
    Backpack style
    Gear capacity (L)
    Gear capacity (cu. in.)
    Weight - metric
    Adjustable torso
    Fits torso
    Fits waist/hips
    Frame material
    Number of stays
    Suspended mesh back panel
    Pack loading
    Pack access
    Number of exterior pockets
    Sleeping bag compartment
    Raincover included

    Osprey Atmos 50 Pack

    Loading Ratings & Reviews...

    Osprey Atmos 50 Pack is rated 4.2105 out of 5 by 19.
    Rated 5 out of 5 by from Osprey got it right - eventually I wrote a review of this pack maybe 4 or 5 years ago, when the first version originally appeared, and pretty well trashed the suspension: the padding was too flimsy, the frame rubbed on my shoulders, and the pack bounced around; I called it an updated external frame pack. When Osprey added the adjustable shoulder straps this year, a friend convinced me to give it another look. While it may, technically, still be an external frame (it has a trampoline backband, and a perimeter frame to which the bag is attached), this isn't the old Kelty pack we all remember. (Well, some of us remember it.) I've had it on a few weekend trips so far, and it is the most comfortable pack I've ever owned. Osprey has taken the best features of the internal frame pack (well-designed pack bag, frame just barely buried in the pack bag) and combined them with the best features of an external frame pack (ventilation and load carrying comfort) to acheive something that is truly a hybrid - I'm not sure you can really put it in either the internal or external classification, and I'm not sure that it matters anyhow. I was using a Kestrel 48 pack, which is also adjustable. I could get the right shoulder strap length, but the frame itself was too short. That meant that the point at which the load lifters connected to the frame was too low to give the necessary angle (usually 30-45 degrees) to let you take the load off your shoulders. In my case, with the shoulder straps correctly adjusted, I would get a zero (or even negative) angle, and end up with tired shoulders at the end of the day. (Not painful, but tired.) The Atmos has a slightly longer frame, and the load lifter angle is perfect - I can move the load completely to my hips, if I choose. The extra frame length also solves the problem that I had with the original version: the frame rubbed my shoulders badly. On the current, adjustable version, the frame doesn't touch me anywhere. The tensioned, trampoline backband is incredibly comfortable, and considerably cooler than a true internal frame back pad. You'll still get a wet back on a hot, humid day, but at least some air can get to your back. You would think that the tensioned pad would hold the load too far away from your back, but the sculpted packbag (which others describe as annoying to pack) allows the load to snuggle up to you, just like an internal frame pack does. The result is that the load doesn't bounce, or move in the opposite direction when you turn (like the old-style externals did.) The bag itself is a clean, uncluttered design: two side pockets that will hold a 1-liter platypus bottle well, leaving only about an inch or so of the bottle above the top of the pocket. (On other packs, the pockets were too short, leaving half the bag exposed and causing it to flop over when half empty.) The shove-it pocket on the front (back? I'm never sure what to call it) is roomy and very functional. But my favorite feature is the long zippered pockets on the front, under the shove-it pocket. They are perfect for my rain gear and (in cold weather) a warm jacket - things you want to get at easily during the day. The interior of the pack is plenty roomy; since I don't use a stuff sack for my down bag, and don't use a hydration system, I don't have the loading issues others mention. The lid pocket is roomy and functional, fully floating, and detachable (great for minimalist summer trips.) The mesh pocket on the underside allowed me to eliminate the small stuff sack my first aid and repair kit used to occupy. The hipbelt and shoulder straps are much stiffer than the original version of the pack, and very comfortable and supportive (the hipbelt doesn't collapse, like the initial version used to.) The hipbelt pockets are a bit small, but OK. The ability to adjust the length of the padding on the hipbelt is really nice; the belt fits well regardless of your waist size. The only complaint I have is that the nylon webbing (the moving part) on the shoulder straps and hipbelt is way too long. I could easily cut a foot off each and still have plenty of adjustability. I'd very much recommend that you look at this pack if you're in the market - and that we start leaving our pre-conceived notions about internal versus external frames at the door.
    Date published: 2014-04-11
    Rated 4 out of 5 by from Decent bag for the Camino de Santiago I bought this specifically for use on the Camino de Santiago in September/ October 2013. I wore it many times while training prior to going on the trip. The pack is easily adjusted and very comfortable. I especially liked the waist belt. When it is properly packed, it really floats on your waist! Many have said it is hard to pack due to the rounded shape of the back, and I somewhat agree. It is a little bit awkward, but not so much that it is something to worry about. I used lightweight packing cubes, which I felt made it very easy to pack. My shoulders do not have a lot of mobility when reaching backward, so for me personally, it was hard to use the outer pockets on the sides of the pack (where most would keep their water bottles). There was more than enough room in my pack for this trip. Since I had a hard time reaching bottles on the side of my pack, I instead bought a bladder and put it in the top pocket behind my head. It worked like a charm, and was easier than using the dedicated water bladder pocket inside the pack. I added some small outer pockets to the straps for my camera, music, and snack. I also used lots of carabiners on the back to attach things like sandals, etc. I strapped my sleeping bag to the outside of the backpack instead of putting it inside the pack. Keep that in mind if you get a rain cover for this backpack! Overall, I thought this pack was great. I saw more of these packs on the Camino than any other brand/ style. Many (most?) people probably would not have the problem that I had reaching the back pockets, because I think that is just due to my quirky body. Try one on in the store and see how it works for you.
    Date published: 2014-04-04
    Rated 5 out of 5 by from Hits the Sweet Spot I finally found the pack that works best for me. I have many packs, from a large capacity external framed pack to a minimalist pack that weighs about 1.5 pounds. I prefer the open air and back dryness of an external framed pack but until I got the Osprey Atmos 50 I could not find an internal framed pack that carried like an external. This pack is right-sized for 3-season multi-day excusions if you pack light (without going to extremes). I actually found it to be roomier than my 62 liter pack. The key to going with a pack of this size is to get a down sleeping bag and a small shelter. Together with a lightweight camp stove everything fits inside quite easily. Lots of room for clothes, food, water bladder, fiter, etc. Once you get down to this size and weight you won't go back. And this pack, although a little heavier than the lightest ultra light packs, puts its extra ounces to good use. The suspension easily carries loads to 35 - 40 pounds in comfort. Something that most ultra lights cannot do. Very good build quality and it is way more adjustable than anything else I have owned or used. I am 6'1" and weigh 175 pounds, and the large size fit me well (at its shortest setting). It has only one place to load from (the top) but I don't find that to be a significant inconvenience. The pack is small enough that you can get to anything you really need quite quickly. I have four good backpacks, but this is the one I will be using most often.
    Date published: 2014-03-26
    Rated 5 out of 5 by from Comfort from the Start I shopped several packs for a smaller version of larger one and settled on the Atmos 50 for an 8 day inn-to-inn hike via the Verdun transverse & gorge in Provence. Immediately comfortable but I am a minimalist - perfectly sized (only wish it had divided upper/lower compartments but realize smaller size - no straps for sleeping bag). It's a keeper for day and inn-to-inn hikes ...with thoughtful harness system for bladder feeder.
    Date published: 2014-03-26
    Rated 5 out of 5 by from Great Intermediate Sized Pack! This is our second Osprey pack, and we continue to appreciate the quality of craftsmanship, attention to detail and lifetime warranty. With REI's help with proper sizing, this pack is a great fit (large) for a 6'+ frame. It's a perfect in-between pack, much more than just a day pack, but sufficient for a light weekend excursion,with plenty of external straps for added accessories. Plenty of storage, lots of padding in all of the right spots and easy access to all compartments. Only con: water bladder is a bit restricted with a full load, but this doesn't diminish an otherwise outstanding product!
    Date published: 2014-03-26
    Rated 5 out of 5 by from Comfortable with a heavy load I use the pack to carry my gear when performing trail work for the USFS. I carry heavy, dense items like tools and fuel in addition to safety gear, food and extra clothing. When shopping for a pack I am not looking for volume but for the ability to correctly carry a load. Frequently I perform trail work swinging tools or clearing debris while wearing the pack. This is a great pack that distributes the load through a series of easily adjustable points. It has one of the best hip belts I have ever owned. The pack does not overly restrict movement or chafe my neck. The comfort is probably due to the correct size frame for my body in addition to the assistance in getting the correct size. Take the time to do it right. The form of the pack body keeps the pack free of my back and promotes air flow. Its not perfect but its much better then other packs I have tried. The pack is a bit on the heavy side as it has a full suite of compartments. For me this is a small price to pay for the ability to keep the 2 stroke fuel separate from my lunch and my felling wedges separate from my hydration bladder. Cant say much about the durability of the pack as this is my first season with the pack but I can say that the Osprey Kestrel I retired when I purchased the Atmos held up for 10 years doing the same duty. I note that it wasn't the stitching that finally gave up the ghost but the fabric lost both its coating and its ability to hold shape At the end it was basically a ruck sack. I look forward to 10 years with the Atmos
    Date published: 2014-03-27
    Rated 5 out of 5 by from An excellent pack for the Money! I use this pack on weekends to hike overnight in various areas of the State parks here in Washington. I've used it for no more than 3 days and nights. I like it a lot. The weight is light and I've packed as much as 45 lbs into it. I usually carry no more than 30, as I like to enjoy myself.
    Date published: 2014-03-26
    Rated 3 out of 5 by from Decent, but not as great as I'd hoped I had been waiting for Osprey to update the Atmos line so when they did I finally purchased this one in early 2012. The good: I love the packbag design with stretch side pockets, front pocket, and dual-zppered front pockets. I can easily get a week's worth of gear and food inside, with pretty good organization. I really like the back panel that offers good ventilation, and Osprey is smart to keep exposed thread/stitching to a very minimum. In my experience, exposed thread lines (especially on the backpanel and straps) get full of sweat and trail dust, then get abraded until they fall apart. The hipbelt is comfy and nicely adjustable, and the pockets are a nice size and easy to get into. The 'could be better': As a former long-distance hiker, I never use the top lid. Took that off right away and am really disappointed there is no strap to tighten down over the top of the storm collar. This is a real pain not to be able to cinch that down, bring the weight closer to your back and keep things up there from wobbling. Every pack I've ever owned has had one of these but for some reason Osprey left it off this one. Major minus. Also, when the pack is fully stuffed and I go to cinch the side compression straps, often times it pulls apart the zipper on the dual front pockets. I have to be real careful about how tight I cinch them so that the zippers don't pull open as I'm hiking down the trail and have everything fall out. Other than that it's pretty well made. I appreciate that Osprey uses higher stitch-counts than most pack manufacturers nowadays. That really helps hold everything together over the long haul. I'd hoped to keep this one awhile but am keeping my eye out for possible replacements due to the issues above.
    Date published: 2014-04-14

    Ask a question and have it answered by REI product experts and fellow outdoor enthusiasts. Need immediate assistance? Use Live Help.

    Loading Questions & Answers...

    How are we doing? Give us feedback on this page.

    FREE SHIPPING With $50 minimum purchase

    MEMBERS, EARN A $20 BONUS CARD! When you spend $100 April 14-29. Single-use bonus card redeemable May 2-12. Details
    • Join REI today!
    • REI Membership
    • REI member benefits include an annual refund (typically 10% on eligible purchases).
    • Join REI today!
    • Sign up for REI Gearmail®
    • and get 15% off selected items!
    • Store Locator
    • Locate an REI store near you.
    • Find a Store
    © 2014 Recreational Equipment, Inc. All rights reserved. REI, the REI Tree and Mountain design, Novara, and
    REI Adventures are trademarks of Recreational Equipment, Inc.

    Find REI on: FacebookTwitterYouTubeFlickrMobile site