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Large top panel zippered slash pocket


Front panel storage pocket


Front panel vertical center zippered pocket


The supremely ventilated, featured and durable Sirrus Series receives a makeover that is more than skin deep for Spring 2017. Now featuring adjustable torso lengths, improved women's specific fit and comfort with updated aesthetics, the Sirrus 24 is the go-to choice for those who prefer panel-loading organization on day hikes in wet or hot environments where staying dry and keeping your cool matter most. When the weather turns, fear not - Sirrus keeps your gear and pack protected with an integrated raincover. Smartly organized pocketing keeps all your equipment where you need it, when you need.

Key Attributes


Incredibly comfortable and ventilated tensioned mesh backpanel with added adjustability for variations in torso length to provide fine-tuned customization fit for every hiker and backpacker.


Users can't feel seams that don't exist, and because there aren't any on the Stratos/Sirrus updated hipbelt, hikers can focus on the journey instead of the pack on your back.


Hope for bluebird weather but know you're covered with our integrated and removable raincover that stows in its own pocket when the sun returns.

Additional Features

  • Dual side compression straps
  • Stow-on-the-Go™ trekking pole attachment
  • Dual side stretch mesh pockets
  • Ice tool loop with bungee tie-off
  • Integrated raincover
  • Zippered hipbelt pockets
  • Internal hydration reservoir sleeve
  • Dual-zippered panel access to main compartment
  • Large top panel zippered slash pocket


Load Range
10 - 25 lbs.
5 - 12 kg
  Volume Dimensions Weight
O/S 1465 in3 / 24 l 19.3h x 11.8w x 11.8d in. 2.557 lbs.
O/S 1465 in3 / 24 l 49h x 30w x 30d cm 1.16 kg
210D Nylon Crosshatch
420HD Nylon Packcloth
420HD Nylon Packcloth
Product Manual Additional languages available here �
Stratos | Sirrus Product Video




I got excited when I slid this bigger pack on and felt the most comfortable hip belt I'd ever worn. At the end of 8 mi, my back still felt like a million bucks. Unfortunately, I was never able to adjust the shoulder straps quite right, so by the end of the hike, my chest was sore where the chest strap/ shoulder straps cross and my arms felt chafed where they had rubbed the outside of the shoulder straps, even though this is a narrower bag made for smaller frames. Unfortunately, this was not the only deal breaker for me. 2nd deal breaker; hydration issues. 1.Bag not included 2. Awkward hose feed from main compartment to shoulder strap 3.Hose flop on shoulder strap (no magnet to keep it in place) 4.Lack of hose insulation sleeve (I don't want to carry water weight that I just drain on the ground because it's too hot/cold to drink because of exposure). I wasn't thrilled with the vertical zipper pouch. It's awkward to get into/see into and makes it hard to find what you're looking for without fishing forever or pulling everything out. The vertical zipper also wasn't very user friendly when I tried to just slide the pack around my body to quickly grab something one handed, like I used to with other packs with horizontal zippers. That said, at least the pack does have at least one additional compartment beside the cavernous main compartment where you're surely fishing for what you're looking for. For me, I'd rather have the main compartment split in half, with top, then mid access, as to organize/ find specific gear. I loved the bigger hipbelt pockets, but still couldn't fit my iPhone 6s+ (isn't that what they're for?) They did fit a pair of gloves, so bonus. The eyeglass pocket was bigger than necessary.. plenty of room to put a hook for keys, which was another item this bag lacked.

San Diego, CA, USA


Like wearing a cloud


I use this for walking, biking and running. When tightened down, this pack doesn't shift at all when running, though you have to make sure it is perfectly adjusted otherwise it will shift off your hips. I can fit my phone into the hip pockets, but just barely. I hope Osprey considers making the pockets an inch or so longer in the future. The Airspeed suspension is pretty much the same as the Anti-Gravity and really does transfer all the weight to your hips. I found an instant improvement in my back pain I would get from lower-quality packs.

Ontario, Canada


I mostly love it but


I have a wonderful Osprey Aura G5 SG backpack that I have used on many trips. I told my friend about it and he bought me an Osprey Sirrus 24 daypack for shorter hikes. I plan to take it on a hike tomorrow but am having incredible difficulty getting my hydration tube through the very small hole. It took me a while to even find it. On the backpack, the hole is large enough to push the tube through and also has a stretch fabric that lets you easily insert it. The only way to possibly get the tube through is to remove the bite valve which I really didn't want to do. Even then, it was very difficult. I'm envisioning water all over the place once I fill the bladder and try to load it. I'm going to work on it but wanted to post this review so that perhaps future packs would have the same kind of h2o hole that the Aura backpack does. I can't really recommend this pack because of this issue.



Good bag for a run commuter


I use this bag on my 7.5 mile run to work. It's been excellent for all my needs. I originally was going to buy the Dyna, which is the lighter running bag that Oprey offers. But this bag seemed more durable. And I'm already running with 10 pounds. The extra ounces of material doesn't matter at that point. My biggest compliant about the Sirrus 24 is the lack of places to to hook on a safety light. I've tried hooking lights to the side pockets which usually works but when you stick on the rain cover there is no place for a safety light and that is when I need it the most. Also the rain cover could be a bit more reflective. Other than that I love this bag. I'm a smaller person. After trying fifty other bags at the store, I found this bag to be the most comfortable and adjustable. I can tie it tight enough for a sung fit that I need while running. The frame keeps the load suspended and from bouncing around. 24 liters is perfect for all my needs--winter wool coat, office work clothes, dress shoes, make-up--etc, dry shampoo and lunch. And it doesn't look or feel like a clunky hiking bag, so I can still walk into the office with it.

Seattle, WA


Hydration Location


For the life of me, I can't find the opening to pass the hydration tube from the main compartment to the outside of the pack. Neither can my husband and he already has an Osprey pack with an obvious opening. I've been closing the zippers of the main compartment around the tube to keep it rom moving, but this just can't be right. I emailed customer service to ask about it but haven't received an answer.



Need a EASY access pocket for phone (camera)


Love the pack. Used it for a couple of long day hikes this past weekend. The big MISS on this pack (and on pretty much every other pack I looked at) was a CONVENIENT place to carry a phone. My phone is my camera when I travel/hike so I want to have a convenient, safe place to access it. I find it very frustrating that in 2017 they don't make a pack with a place to access a phone! The little pockets on the hip don't work for a phone - I have an iPhone 7 (not the Plus) and it's still too large to fit in the little zip pocket. Yes, I can get it in, but it is SOOOOO not worth the struggle. PLEASE consider this as an option in the future. Honestly for $130, it should be a standard feature. The only other comment would be to have another pocket on the inside to throw things in that is not just the deep pocket along the back.



Hydration problem


Comfortable pack with good capacity and flexible loading options. I use it for hiking and skiing. One problem though - the opening for the hydration tube is way too small. It is difficult to get the bite valve, shut-off valve and clip through the slot. I didn't expect this flaw in a modern pack.

Livingston MT


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