I saw good reviews about the atmos AG 65 and bought one from backcountry. I could not be happier with it. I hiked 30 miles in the smoky mountains and the AG 65 was really comfortable to carry.

Sometimes you just have to hit the trails and go mountain biking when your doggo's paw is injured. This backpack fit my boy Huey for a nice mountain bike ride in Park City, Utah. I know the bag isn't made for this, but when you're in a pinch you do what you can. Huey was quite pleased about hanging in the back of our Osprey pack.

In all seriousness this is THE backpacking backpack with unbelievable comfort. I use this on any long backpacking trips. The mesh backing is grand and Osprey were the one's to bring the best frameless suspension system to the market. Like Patagonia, Osprey stands behind their product. If you have any problem with the backpack years down the line Osprey will help you out. You really can't beat that. On their website it even says, "Osprey will repair any damage or defect for any reason free of charge – whether it was purchased in 1974 or yesterday." I'm 5'11 around 158lbs and got a medium!

This pack has some amazing features that will help you go farther and faster. The anti-gravity system works amazingly, it provides the perfect ratio of weight distribution from the hips to the shoulders. Compared to my old 65 L pack that I got on Amazon years ago, the Atmos feels like a feather. The adjustable back panel, shoulder straps, and hip belt make it easy to get the perfect fit. There are a lot of nifty pocket options making organization a charm. My 40 degree down sleeping bag easily fits in the sleeping bag compartment, which is removable for some organization purposes. I use this pack for backpacking. I can easily fit my sleeping bag, tent, hammock, clothing and more into this bag. I also use it for my climbing adventures. My 70m rope, harness, quickdraws, shoes, helmet, hammock, extra layers, and more all fit easily. I am 6'0, 175 and a got the medium size frame which fits me well. I would highly recommend this pack.

Used for a day hike to carry all my family stuff, as well as a weekend trip.

I needed something between my 35L Lowe Alpine and 85L Gregory. I had tried the previous version of the Atmos and found it did not handle heavy loads well over 35lbs or so. The new model went on sale so I jumped all over it and picked it up due to positive reviews on how well it carries heavy weight.

Simple answer is that this backpack is a total dreamboat in every way. Looks good in gray, perfect features, and unbelievably comfortable suspension.

As a previous reviewer pointed out, this pack works great for skinny guys with no hips. I'm really tall and have around a 33 inch waist. The medium fits my waist perfectly and I am just barely inside the back length with it fully extended up for the shoulder straps.

Even without the excellent suspension, this pack is still tops in terms of features. When carrying heavy loads, it's not fun to have to stop and take the pack off in order to get an item. My Gregory pack can handle 60 pounds no problem, but it has the most pathetic hip and side pockets ever. The Atmos seems to be designed by someone who actually likes to access items without even stopping or taking off the pack. The two hip pockets are plenty big for snacks, tools, phone, etc. The side pockets are easy to access and stuff up to a 32 ounce water bottle in each.

Compared to the older version, I think the hip belt holds tighter and the shoulder straps seem to be much thicker and more comfortable. I would say the new version probably holds weight better by about 10 pounds. So 45 pounds in the new version feels like 35 pounds did in the old one.

The top lid is actually very useful compared to my other packs. First, it's pretty huge once it's stuffed full. I can fit my entire camera bag into it, which contains a Sony interchangeable lens camera and two lenses. On top of that, the access is from the shoulder side of the pack, so the lid is easy to access when the pack is leaning against a tree or on the ground with the zippers facing up.

Weight limit? Well, it is a 65L bag, so unless you're carrying gold bars, it's hard to fit enough into there to hit uber heavy weights. I tested it out with 5 gallons of water in the pack, and weighed around 45 lbs overall. Opsrey lists the Atmos as being able to carry up to 50 lbs. I think this is totally possible to hit 50 for short distances. Say, for example, you are carrying 40 lbs, but need to carry an extra gallon of water for a ways, you would then be a bit over 48 lbs. It would be far less comfortable, but totally doable. I would not want to carry 50 lbs steady for a week straight using this pack. Something like the Aether series would be better suited.

The negatives? They are actually positives! I don't like the flappy jacky thing that gets in the way every time I need to open the top of the pack. I'm going to cut it out of there for a nice weight reduction. I also don't need the SUPER long waist straps and can cut them down by about a foot each. Yes, A FOOT EACH!!! There are more things I don't need on the pack that can be cut off. Why is this cool? I can get the weight even lower than listed without losing any feature I need/want. I could really hack at this thing and do some sewing to easily drop 1/2 a pound of weight. I obviously don't care about the warranty. haha

I got this for my husband after I got my self the Osprey Aura 50L. He liked the idea of the anti-gravity suspension system so decided to try it out himself. He loves this pack and enjoys backpacking with me even more because of it.



He likes the 65L because he prefers having the room if he wants to be a little extra on our backpacking trips. But being able to remove the brain is a helpful option if we're just going on an overnighter and don't need to bring as much stuff. The stretchy pocket is perfect for snacks and rain gear to grab quickly.



He also likes that this packs stays up on his narrow hips well and doesn't hurt his back. His last pack never stayed up so all of the weight would fall on his shoulders. He doesn't have that problem with this pack and is able to adjust the hip belts to his comfort.



He's 5'7 with an average torso and the size small fits him well.

I have an older model osprey and I love it so I bought this one for Christmas for my son whose smaller framed than I am and slightly longer. I say this because otherwise I'd take his! Since my osprey they have made smart updates that make it easier to access, more usable pockets and the breath ability on the backpack to back is incredible. Lots of adjustment, interior water bladder., smart straps and buckles. My son and I have done several weekend hiking campouts in prep for the AT week this summer.

I bought this for my partner for Christmas and he loves it! We haven't had a lot of opportunities to use it yet, but so far he thinks it's perfect. The heat mold able waist , all of the pockets and the bottom access features are the best. Look forward to taking it to Kings Peak this summer!

I like this pack a lot. I bought it for hiking/camping/backpacking and it has performed well in all three areas. Lightweight and breathable, lots of storage space, and it looks sharp as well. I love Osprey's guarantee on their products so this bag was a no brainer when it was time for a new one. I use Osprey for 90% of my packs and wouldn't hesitate to recommend them to anyone.

This is the first pack I've ever owned and I fell in love with ever since I put my eyes on it. I have a red med. pack (6'2"), and it looks amazing. I've taken it on a couple of hiking and after breaking it in a bit it works great! I love the compartmentalization that it has, as well as the ledge separating the bottom from the top (if you want). All the straps help keep it tight and secure without any sliding. I did get squeaking like the others mentioned after using it a bit, but it went off and on. We'll see if it continues. Used for a day hike to carry all my friends stuff, as well as a weekend trip. I handled everything with room to spare. Can't wait to take it out on more adventures.

great small pack for my 11 year old backpacker

Pretty good bag. The suspension holds weight super well. And I like how specific you can get when making adjustments to the frame. The big drawback for me was that it squeaked. With. Every. Step.

I looked into this and it seems to be a common problem with the pack. I would look elsewhere until they get this sorted out, or allow for time to return it before your trip to mountains.

I use this pack for just about all my ventures, whether it be hiking, backpacking, climbing, and even ski mountaineering. I love how easily the zippers can be closed, as well as the various compartments around the entire pack. The added storage in the hip belts is a huge plus, as well as the removable brain. The only reason I gave this pack 4 stars instead of 5 is because the pack can get a little uncomfortable after about 35 pounds, but this very well could be becasue I need the pack fitted a bit better. Other than that, this pack is a phenomenal do-it-all pack.

Just finished three days hiking over the Tetons. Fully loaded my pack weighted 40 pounds this is about the limit of what I would carry in this pack. That being said if you are carrying less than that this pack is very comfortable and adjustable. It has a great set of features it would be nice to have an integrated raincover but that's not a deal breaker. I highly recommend this pack.

Brain can't be used as a daypack
Does not include rain fly
Large was almost too big for me and I'm 6'4"
Breath-ability was fantastic, pack did not strain my shoulders, large easy access pockets on the hips great for storing snacks, very well made, and of course lifetime warranty!

I spent a lot of time trying on different backpacking packs, and I kept trying to find a cheaper option, but this bag was so much better than the rest I ended up just buying it! I love it!

I've only had this out on one hike but it was a game changer over my old pack. Make sure to measure for the correct sizing, both pack size and hip belt sizing, and then get the hip belt molded to you(your waist/hips will thank you after your first real use). It was a tight squeeze to carry an early spring backpacking load for a 4-day Smokies AT section hike. The AG system is unbelievable how it makes 35# load feel lighter than 27# did in my old pack. The detachable lid/day-pack works great for base-camp day hikes as well as for using the pack for civilized travel as well. Almost everyone in our backpacking group has converted to AG packs after seeing them in action.

good backpack and fit

I ordered this pack for my Havasupai trip in October. It’s going to be a 5 day trip and needed something big enough to haul all my gear and supplies for that length. I’ve tested it out on shorter trips and it fits like a dream. So much room and so many features. I can fit so much and the weight distribution makes it feel less than it is. The ventilation for cooling will be very helpful in the desert.