The revolutionary Anti-Gravity Suspension system in the Osprey Atmos AG 50 delivers an unparalleled balance of support and ventilation. Load-hauling capability and smart organization add to the pack’s hard-earned trail cred.
An engineering work of art as much as a carrying system, Osprey's Anti-Gravity Suspension system equips the Atmos AG 50 with weight-carrying efficiency, breathability, and a contoured fit that’ll nearly make you forget you have it on your back. A broad-mesh, tensioned backpanel stretches seamlessly from the shoulder straps all the way out across the hipbelt. Though the pack maintains constant, responsive contact with the wearer, warm air can escape freely because of the separation caused between the mesh and the pack itself. Innovative stiffeners in the load-lifters even enable the shoulder straps to stand away from your body without jeopardizing performance. Beneath the mesh, a lightweight aluminum frame provides support and distributes weight. A sliding sternum strap and an adjustable Fit-on-the-Fly hipbelt with extandable padded “fins” further enhance fit. Accommodating backpackers of different heights, the pack is available in your choice of sizes. The Small Atmos AG 50 fits torsos ranging from 16”-19”, the Medium fits from 18”-21”, and the Large accommodates torso lengths ranging from 20”-23”. Built in adjustability in the harness makes it easy to reset the height of the shoulder straps to offer the best fit within those stated torso ranges.
Designed to comfortably carry 25-40 pounds of gear, the Atmos AG 50 lends versatility for outings ranging from overnight trips to fast-moving, light-packing extended backpacking trips. The Small size offers 2868 cubic inches of storage capacity, the Medium offers 3051 cubic inches, and the Large Atmos AG 65 has a 3234 cubic inch capacity. The main packbag has full top access and a zippered divider between the main compartment and a separate front entry sleeping bag compartment allows for organization of wet and dry gear. When hauling longer items or in need of access between the two compartments, you can unzip the divider and convert the Atmos AG 50 to a single, large compartment.
A welded, stretch woven nylon pocket on the front of the pack allows you to stash extra layers or other gear. Dual zippered pockets located inside the floating lid of the Atmos AG 50 provide other organizational options. If you want to save weight and/or you are traveling light, you can remove the lid entirely and use the integrated, low-profile FlapJacket lid to keep the contents of the packbag fully protected. Side compression straps help you cinch down your load and also serve as lash points for additional gear. Stretch woven side pockets are the perfect place for stashing water bottles or other smaller items.
The pack has integrated trekking pole loops and an internal lined sleeve and dual exit ports combine to make the Atmos AG 50 hydration compatible (hydration system not included). Zippered mesh pockets on the hipbelt keep snacks and essential items within easy reach.
Constructed of lightweight, abrasion-resistant fabrics, the Osprey Atmos AG 50 is available in your choice of sizes and colors.
- Top load access to main compartment
- Removable floating top lid
- Upper side compression straps
- Lower side compression straps
- Dual stretch mesh side pockets
- Dual zippered hipbelt pockets
- Dual ice tool loops with bungee tie-offs
- Large stretch mesh front pocket
- Lower zippered sleeping bag compartment
- Dual zippered top lid pockets
- Internal reservoir sleeve
- Stow-on-the-Go trekking pole attachment
- Internal top compression strap
- Integrated FlapJacket for weather protected lidless use
Best Use Backpacking Access Top Loading w/ Lower Sleeping Bag Compartment Warranty Lifetime Volume Small: 2868 cu in
Medium: 3051 cu in
Large: 3234 cu in
Type Internal Frame Backpack Torso Adjustment Yes Sternum Strap Yes; Adjustable Position Maximum Weight 40 lbs Material Main: 100D x 630D Nylon Dobby
Accent: 210D High-Tenacity Nylon
Bottom: 420HD Nylon Packcloth
Item Weight Small: 4 lb 2 oz
Medium 4 lb 5 oz
Large: 4 lb 8 oz
Hydration Compatible Yes Frame Material Aluminum Fits Torso Small: 16"-19"
Dimensions 31" x 14" x 16" (Medium) Detachable Daypack n/a
Real Customer Reviews
- Osprey AG Almost There
Likes: Ventilation on this pack is fantastic (perhaps unequaled?), and the Anti-Gravity suspension feels great on the back. Overall construction quality is very high, as is durability. Between the "flapjack" lid and compression straps, you can convert the 50AG down to a reasonably-sized overnight/full day setup. Angled-access water bottle pockets are so nice, I can't go back to purely vertical pockets. The "gray" color (really more of a drab green) is one of the few Osprey packs that doesn't look really gawdy/lurid.
Dislikes: The AG is great overall, at least conceptually, but it didn't win me over in the hipbelt area. Though I can't say for sure the issue lies in the AG lining, rather than the design of the belt pads themselves. The stiffness is about right for this load bearing class, but I found no matter what I did, the bottom edges of the belt would dig into me causing pressure point discomfort. I have read other reviews mentioning this condition, so I guess I'm not the only one who has experienced it. Additionally, some reviewers have claimed that the hook/loop for the hip belt adjustments can give out after awhile preventing the belt from holding its setting. I never had this issue, likely because I barely used the pack before returning it. Beyond the hip belt, I found that the pack sat so far off my back that any weight felt heavier and led to a sensation of getting pulled backwards. So turns out the fantastic ventilation characteristic of the AG is a double-edged sword. If they produce the AG with less standoff and a comfier hip belt, it would probably be close to perfect (will have to check out newest models). Lastly, two very minor dislikes. First is the 50AG doesn't have bottom sleeping pad straps, but the 65AG does; I can't figure out why. They don't cost/weigh much and most manufacturers are making them removable now anyway, so the end user can make their own call. Second is the "stow on the go" trekking pole attachment. It's a great concept, but I don't find it all that convenient In practice. You pull the cordlock and thread the pole handles up through the loop, and then thread the bottoms into the loop on the bag and then tigten the upper loop. It does work, but it's awkward, especially whilst moving. I just have a hard time believing this is the best Osprey could come up with. How about a strap that is adjustable with a strong magnet closure? So you adjust it around the poles to minimize slack and then simply break through the magnet when you need the poles. This strap need not be too tight, just has to prevent the poles from getting in your way. Anyway, that's just me being really picky. Not trying to totally bash the pack, but want to be fully honest with people concerning its limitations, so they know exactly what they're getting into. It's still innovative and usable enough to earn 4 stars.
- Comfortable but lacking some features.
Likes: very comfortable pack
can remove the top flap to reduce weight and simplify
Dislikes: other than the two pockets in the top flap and the meshy pocket in the front, there are no other storage areas, just the main bag.
there are no bottom straps for a sleeping pad.
there are no attachment points for any other gear.
there's no included rainfly (Osprey would argue this would add to the cost, but the reality is it would cost very little and many other packs include them)
- Great pack for my Broken back!
Likes: The Anti-Gravity system does not hurt my lower back (fusion surgery point). I have been able to hike and wear this pack comfortably and have been able to experience the outdoors again since my surgery. The material is really durable and the compression straps really hug the contents of my bag close to me so it doesn't swish and sway.
Dislikes: The only thing I would love to see is a rain cover included, but it is not a deal breaker.
- Innovative suspension system but at the cost of weight
Likes: Extremely comfortable with loads maxing out around 30-35 pounds. It truly feels like the pack just floats on your back. The hip belt is big and extremely comfortable. For someone like me who sweats a LOT the airflow of the anti gravity system is immensely beneficial.
Dislikes: Somewhat heavy comparative to the weight it effectively handles. It becomes a comfort vs weight trade off.
- New Design Has A Few Pluses... And A Few Minuses
Likes: The new integrated mesh design was very comfortable, and I actually thought the hip-belt pockets were larger than my old Atmos pack. The torso adjusters are a great idea (instead of the previous Velcro design), but you will need to fish around to find the levers first.
Dislikes: Didn't like the extra flap that Osprey added to use when taking off the lid pack. Also didn't like the fact that the hydration hose port is now centered on the back of the pack instead of on either side. My hose keeps rubbing on the back of my neck. This new design also adds almost a half pound over the previous design.
- Outstanding pack for all seasons and distances
Likes: Love the ability to remove top compartment to reduce weight on shorter trips. Like the "fit on the fly" hipbelt (though, the Velcro doesn't hold well when the tabs are extended). Very functional top compartment pockets. Adjustable torso height makes custom fitting a snap. Carries heavier loads easily.
Dislikes: Hipbelt pockets are a little small and more difficult to access (compared to my ULA Circuit). I'm a little concerned about the Velcro not holding well when hipbelt is extended. The water bottle pockets are not as easy to access as hoped.
- I believe this is a great improvement over the old Atmos. The old model had 2 very uncomfortable hot spots right on my hip bones. This model seems to even out the pressure throughout your hips and back, making it very comfortable to wear on extended hikes
Likes: Suspension system. Excellent quality. Very well made compared to any other ones I looked at.
Dislikes: Lack of straps on bottom and attachment points.
- After completing a two day hike in the Ozarks carrying 40lbs all I can say is that this pack is amazing!! Zero pressure on the shoulders and great air flow.
Likes: Suspension, Air Flow, Large Rubber coated zipper pulls, Removable top compartment, Multiposition elastic water bottle pockets
Likes: So far I have only carried the pack for one weekend, but it was great. The suspension system made my usual weight seem much lighter and I could feel a pleasant breeze on my usually sweaty back. Everything about this pack is extremely well thought out. All of the fabrics seem like they are made to last; even the zippers have these great little pulls that are so easy to operate.
Dislikes: There are a couple of downsides to this pack, but not enough to take away a star. There are no external pockets on the main part of the pack. There are two enclosures on the lid (one is intended for a rainfly that isn't provided), an extremely small pocket on the hip belt and an open mesh pouch. This means organizing small items may be problematic for some people. Also, the amazing suspension system creates a curved back wall to the pack. As such the pack will not hold as much gear as it looks like it should. I however, found the space to be fine for several nights in cold weather.
Likes: Fantastic new design from Osprey. The minute I put I on, the pack felt like it was "hugging" my sides. The pack feels like an extension of my body, and feels great loaded with 20 pounds. 5/5 stars!
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