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An unbeatable combination of features, light weight, and value.

Osprey's Atmos 65 Backpack has become the no-brainer pack of choice for warm-weather backpacking. The AirSpeed back panel is designed to circulate more air to keep you cool on exposed trails and warm, humid mountain treks; it features a LightWire alloy peripheral frame that creates a low-profile airspace while optimizing balance, as well as scalloped side openings that enhance cross-ventilation. Throw in a highly customizable fit, incredible light weight, and a host of pockets and features, and you get a pack that's ready for anything in any season.

  • Fine-tune your fit with different torso sizes to choose from and a hook-and-loop adjustable shoulder harness that moves over a 3-inch range
  • Slide-adjustable sternum strap helps take the load off your shoulders
  • Adjustable hip-belt uses dual-density foam for support and spacer mesh for breathability
  • Stow-on-the-Go trekking pole attachment lets you quickly tuck your poles out of the way without stopping to unload
  • Stretch front and side pockets give you extra storage and organization options
  • Zippered sleeping bag compartment includes divider
  • Two ice-axe loops with bungee tie-offs securely hold equipment
  • Zippered hip-belt pocket keeps your digital camera and energy gel packs close at hand
  • Internal hydration sleeve with clip makes it easy to get your fluids on the trail (reservoir not included)

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Osprey Packs Atmos 65 Backpack - 3800-4200cu in

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Here's what others have to say...

4 5

Everything you need

  • Familiarity: I've put it through the wringer

I use this pack for everything. The primary activity that this pack is used for is rock climbing. It fits all of the gear that I need for any situation with room to spare. The only time that I filled this pack to its bursting point was on a climbing trip when I put a rope inside and strapped two to the exterior, with all of my climbing gear safely inside.
I have also used this pack for backpacking. Needless to say, it performs very well in it's element. The sleeping bag compartment in the bottom is so convenient, I no longer need to waste valuable space in the main compartment for my bag.
You can stuff this bag as full as your heart desires then sinch it down with the adjustable straps so that the profile of the weight of the pack is close to your body. This backpack is everything you could need.

4 5

Big-Relatively Light-Durable

  • Familiarity: I gave it as a gift but have feedback to share

I bought this as a gift for my step-dad who needed a winter backpacking pack. Osprey hits the nail on the head with the Atmos. It's big. You can fill this thing up with bulky winter gear, fuel, food, water, 0 degree, bag and four season tent, and it will still carry well. The features are all there and the suspension is burly . The best part about the pack is Osprey's unconditional lifetime warranty. This is a great pack for people new to backpacking who are going to be carrying weight over 30lbs or more experienced backpackers on extended or winter expeditions.

5 5

Lived up to the hype

  • Familiarity: I've used it once or twice and have initial impressions

This pack lived up to the hype. I have used it on quick overnight getaways. Packs easily, holds what you need; perfect for short or long treks. Balances well, I didn’t even feel it on my back. Excellent price/performance/weight ratio.

5 5

My favorite Long Trip Pack

  • Familiarity: I've put it through the wringer

I guess I have had this pack for nearly 5 years and have had it everywhere from the Northern Cascades to the Appalachian Trail. This pack holds everything but the kitchen sink for 2-3 night trips. Since I am a light packer these days, I find it best for a week plus. With all of the attachments Osprey has it is a sure bet for the money you spend. I most recently used it for the southern portion of the Appalachian Trail in June. It was hot and muggy but the Airspeed back panel kept me "cooler" and dry. If you are trying to carry a lot of gear, this is your pack for warmer weather. Be sure to take the time to set the pack for your torso before loading it down. Fitting appropriately makes all the difference on those long trails.

5 5

Great pack!

  • Familiarity: I've used it once or twice and have initial impressions

I love this pack! Holds a shockingly large amount of gear and has plenty of anchors to tie additional gear to the outside. The 'airflow back' kept me cool while hiking in 75+ degree temps. I felt the only shortcoming (as with others) are the hip belt pockets. When the hip belt is fastened, they are difficult to access. I also bought the hydration pack - great add-on and works with my daypack. Other than that - great pack and AMAZING Backcountry customer service and knowledge!

5 5

Awesome bag

Bought this bag as a travel bag to pack everything I'd need to live in and travel with for a few months in africa. Everything about it fits what I want: great size, weight, actually really comfortable to have on even for its size. The design of the pockets and bag lay out is really incredible. I hope to have this bag for life and get it to every continent.

5 5

Great Lightweight Backpack

  • Familiarity: I've put it through the wringer

I bought this backpack a year and a half ago for multi-day backpacking trips here in the Intermountain West. I was looking for a lightweight back that could carry everything I needed for several days in the mountains, and the Atmos has done that very well. While the materials appear to be delicate, the pack has held up well during my many trips. The features I like best are the mesh back support which provides great ventilation to keep my back cool, the two outside zip pockets for easy access to commonly used items, and the wide "grab bag" pocket on the outside where I can stuff a lot of items for easy access during the hike. The pack fits well and the only complaint I have is that the pockets on the hip belt are a bit tough to access when I'm wearing the pack (I also own the Osprey Kode 30 for winter and those hip pockets are extremely easy to access). Overall, I'd highly recommend this pack for 3-season hikers who want a light pack that's tough enough and large enough for extended time on the trail.

5 5

Amazing pack!

  • Familiarity: I've used it several times

I just picked this pack up and I am extremely happy with it. It's been on two hikes with me storing around 35 lbs of gear and it felt amazing. Easily stored 3 days of food, 12 L of water, tent, pad, water-treatment (MSI), a GSI Dualist and fuel and a Tadpole 23 tent as well as various other items. Carried it through 14 miles of hot and humid (95F/91% Humidity) Texas Pine trails.

Amazing pack!
5 5

Favorite pack

  • Familiarity: I've used it several times

Love the pack! Very comfortable and roomy. Can't wait to be back on the AT with it in a few weeks. It is also coming with me on my thru hike of the AT next year.

5 5

killer pack

  • Familiarity: I've put it through the wringer

I use this guy for everything- backpacking, filming, skiing, even some longer day hikes, and it always performs with flying colors. I am yet to find something that this bad larry can't handle!
The only thing that I'm not a big fan of is how it packs outward behind quite a ways, but that's a preference thing and not really a problem. Also, there aren't as many exterior straps for hanging stuff as I would prefer, but there's plenty of room inside!
Buy it up, you won't be disappointed!

Spacious  Pocket

Spacious Pocket

Here's a picture of one of the roomy side pockets. It definitely helps with organizing all sorts of stuff.

3 5

Just not right for me

  • Familiarity: I've used it several times

I thought I would love this backpack. It has a lot of cool features. I like the sleeping bag compartment, the 2 front/side pockets, sleeping pad straps, stretch front pocket, and the suspension. I like the front/side pockets because I could put my quickdraws, cams, etc in them.
However, it didn't carry comfortably for me. When I tried it out with 30 pounds (just walking around the house), it felt fine. However, I just got back from backpacking with this and it did a number on my hips and shoulders. I found that the metal frame rubbed against the back of my hips and that the hip belt was not well shaped for the front of my hips either. I am a pretty skinny guy... maybe that's why, but anyway, this pack just isn't for me. I'm sad to say that I'll be returning it.
I'll probably check out the aether 60. The hipbelt on that has gotten all sorts of praise. Plus, I hear it's super stable and carries very well.

I'm glad I'm not the only one. After a 3-day trip to Mt. Whitney, my hips were brutalized. I spent a great deal of time trying to make adjustments, but my gripes are exactly the same as yours.

How skinny are you guys? I'm 5'8 145lbs and was considering this pack until I read your reviews.


4 5


  • Gender: Male
  • Familiarity: I've put it through the wringer

I continue to love this model; it has started to show signs of what I would call premature wear; I might even send it back in to BC for a replacement. Still, this backpack is amazing, I have used it in about 40 climbing trips in the past year in three different continents and I use it as my main piece of luggage.

How much I love this backpack? Well, I have started to name the different compartments and I've found it to be an amazing idea!

Susan - Top compartment, where I keep stuff that I need very very handy.

Paul - Front compartment, the one without a zipper, I used to refer to it constantly as "where I keep the Nalgene", until it started getting old and started to refer to it as Paul (for whatever reason).

Alicia - The right belt pocket; where I keep the keys (yes, the name Alicia fits great).

I haven't named my other compartments yet, don't have a need to refer to them as much, but naming Susan and Paul has been great to get my climbing buddy to hand me stuff when she's next to my Osprey!

5 5

awesome pack

  • Familiarity: I've put it through the wringer

love this pack - it's kind of a external/internal frame hybrid, super light and comfortable, with the mesh back/air circulation that I loved in external frame packs of my youth. Well made, excellent guarantee, lots of cool useful pockets. could not be happier with it.

5 5


OMG! I finally found a pack I like! Jesus chris, took forever to find it, but its worth it!

Ok, onto the review; this pack feels like heaven, pretty light, considering its not a minimalist pack. You get a lot of support and I love the AirSpeed back panel, no more sweat!

I've grown used to the front zipper, which this one doesn't have. I have to admit, it took some time to get used to not being able to access pretty much anything without having to redo my pack. But, I think, not being able to do that, has helped with making my packing much more ordered. And this thing has plenty of lightweight pockets for the stuff you need to keep handy.


I pack things I need to access quickly into the top pouch and the outside pockets. I save the interior for my "camp stuff" - bag, tent, airpad etc...

5 5


This pack is great, perfect for a weekend trip. The fit is great, the Airscape back panel keeps me cool while keeping the load evenly distributed. There are a lot of pockets and storage options. I love the hip belt pockets, they are great for snacks, GPS, maps, headlamp, or any other small item you need quick access to. The ice-axe loops are great for storing your trekking poles when you want them out of the way completely. The best part is Osprey's warranty, I had to replace some buckles and webbing that my dog decided to munch on. They where awesome! It was quick and easy, they didn't even charge me. You can't go wrong with Osprey!