Love the size, the color (black), the fit (I am 6'2 205 size large pack), and the air core back is great in the summer. This fits everything I need for any summer outing and short winter outings. For the intended use of a daypack this has more than enough space. For the lightweight hiker this is a great pack that can hold it all for at least a weeklong summer trip. The only downside is that you can't remove the top pocket and the stretch sides are hard to get bottles out of when the pack is loaded. Overall good load distribution, 30 lbs is definitely reaching the limits of my comfort level with this pack. 22-26lbs is the sweet spot for me. Highly recommend.

This is a great winter bag---winged compression straps hold snowshoes tight and at 2600 cubes (lg) it holds all my winter gear--top is roomy enough for extra gloves, hats, and food and the mesh pockets are big enough for insulated nalgenes--ice axe hangs securely--hip belt is super comfy--good job by Osprey

This is my second Osprey pack (the first is an Aether 85) and I am very pleased with it so far. Hugs my back comfortably (I'm 6'2") and the load feels really stable when shifting my weight around. The pack panel is exceptionally well ventilated. My only complaint is that it is more TALL and less WIDE than I would have preferred but nothings perfect.

Its a nice little backpack. But the backpack framing system(Arch on the inside.) Takes up way to much room inside of the main compartment. And waist belt set up is another draw back, One belt would seem to be sufficient and the straping system way to many loose ends dangling and the hydration system(Exterior sleeve)alittle hard getting the water bag in and out of it... It would make a nice little day pack....

With all its dangling strap ends and a back frame that takes getting use to, Not a bad (2400cu.in.Backpack)..It can surprisingly pack away the gear.
The back panel hydration cavity is alittle hard to enter with a bladder bag. The wasit belt system could be alot simpler doing away with the two belt system. The frame could be made alittle more wider(contoured for a more stockier torso.) Had forgotten all about the side entrance zipper on the left side of the bag, handy little unit.. Enough strap on the compression wings to place a light sleeping bag there. Can do a over nighter with this outfit....Only time will tell what it can handle....

I'm 6'1" tall 190lbs. Large size fits great, forms to the body very well, good freedom of movement. Take your time packing it so you don't warp the air core and it will fit tons of gear. Air core is great for the cold weather lets your back breath, keeps you dry. Plan on using this pack for an ultra-lite 24 day trip this spring. Osprey ROCKS!!!!

This is a great pack. I did some serious looking for a medium capacity pack with all the right pockets and that could compress nice and small. This pack has been great for traveling and for camping, i would highly recommend it.

The only thing that threw me off is the sizing. I am normally a medium in all that i buy. According to my torso length, I need a small in this bag. I tried a small Osprey in the store and indeed that is what i needed. Since the torso i s not adjustable it VERY important not to get a pack that is too long. The straps on the pack (as you will read in other reviews) are quite long. I had no issues sizing it to myself, even though according to the other measurement the pack would be too small.

I just used this pack on a 10 day hiking trip in the Swiss Alps. Fits wonderfully, hauls a lot of gear and it lightweight. I am 5'7" and the small fit me perfectly. The ventilation really helped on the warmer days and the hip belt helps to snug the pack nice and close. Would highly recommend!

This is a fantastic pack with lots of room, great fit and handy extras. One thing I would note is that I am a 5'8" woman, with a 17" torso. The medium pack when loaded was way too long and hit me on the backside. The short pack though, is just perfect. Backcountry was wonderful and quick with the return and re-ship to the smaller size. Very comfortable pack, love the air core suspension. Highly recommend for long day trips and light overnighters.

I already have the Large Stratos 24 as a day pack. I bought this one for multi day use however decided that it would be too small for my next 5 days out on the TRT. So I returned it and purchased the Large Atmos 65. Super lightweight and with the same great, un-matched "Aircore" back support.

I'm going to the Himalaya in a few short weeks and wanted the 'right' pack. After test hiking many this summer I finally found the one I love. It sits where it's supposed to and doesn't move around. It gobbled up my gear and made it feel light. And the ventilation? Sweet!
I am 5'8" and found the medium to be the best fit.

This is the most comfortable pack I have found so far. It is great for long weekends. I love all of the features on this pack. All the pockets and easy access points throughout the bag. The hip belt pockets are perfect for an energy bar and multi-tool or iPod. But it packs away everything you need. I have carried 30+ lbs. for a weekend and the pack does not feel like it weighs as much. Also I am a bigger guy and usually sweat a lot with a bag of this size on, the mesh back panel makes it much more comfortable, especially after 8-10 hours of hiking. The air flow system in the back panel will keep you fairly dry and comfortable during your hike. This is a great pack for day trips and weekends!

The Osprey Stratos 40 is a nice pack. It is built of quality material and that is refreshing to me in a world of cheap stuff. The only thing I dont like about this pack is the Aircore feature. It is comfortable, yet it seems to steal space from the overall capacity of the pack. I put a box of tools in the pack (weight test) and shoved things in around it and it pressed the plastic disc of the Aircore panel forward into my back. Overall, the pack is sweet, I am just not a fan of the Aircore back panel suspension.

I researched many backpacks as I was heading to Germany for a few weeks. Here is what I was looking for:

1) Most importantly a pack that I could carry on (or check at the plane, not as baggage)

2) A pack that could hold about a week's worth of clothes and minimal travel items.

3) A pack that would carry well once fully loaded, that wouldn't kill my middle-age back

4) Nice looking, with pockets

After doing all of the research I made the decision to go with the Stratos 40. I just came back from Germany, and have to tell you it was the perfect size and companion as I moved from Munich to Cologne, via train, car, plane, and hiking. It had room enough for everything I needed and the additional room left for some small items purchased along the way. On smaller commuter flights it had to be checked at the plane, but on the international flights the Stratos 40 fit perfectly in the overhead compartment. I didn't hear one complaint from any airline personnel about the size or weight. My traveling companion decided to take conventional luggage, and it was the WRONG thing to do, as I watched him having to lug it around the airport, wait for baggage check, not to mention the difficulties he had as we moved around by rail. I do wish the Stratos had a little better access, but understanding it IS a backpack it has been manufactured using quality material and looks like it will last a long time for me.

I plan on using the pack for more conventional outings, camping, and hiking- but it was PERFECT for what I needed in Germany and abroad.

I use this pack for peakbagging 4 season in the North Cascades. From the durable materials, large hipbelt pockets, supportive - ventilating suspension, rear horizontal straps for snowshoes, rear wet pocket,and generous lid volume in a tight lightweight package I don't think it can be beat. Those are a few of the many features.