Ready to buy? Price protection guaranteed!
Home Page

Detail Images

Current Color

Osprey Packs Sirrus 50L Backpack - Women's


Free Shipping on orders over $50*

Sirrus 50L Backpack

Get out for a weekend—or a week—with the Women's Sirrus 50 Backpack from Osprey Packs. This lightweight hauler features Osprey's AirSpeed ventilated suspension system to not only carry your load smoothly, but also help to keep your back cool so you can hike for longer under the hot summer sun.

Top-load access makes it easy to stuff everything inside that you need, and a separate sleeping bag compartment allows for some on-trail organization. A removable floating top lid and removable sleeping bag straps allow for easy customization of your load. To keep you hydrated, Osprey included an internal reservoir sleeve, and, speaking of water, an integrated rain cover ensures that you don't end up at camp with a backpack full of soggy clothing. A variety of pockets and tool attachment systems, including the Stow-on-the-Go trekking pole attachments, lets you bring along exactly what you need for your journey.

  • Perfect pack for quick overnights or multi-day excursions
  • Tough nylon construction ensures durability
  • Ventilated suspension system carries your load smoothly
  • Mesh harness and hipbelt stabilizes the load with comfort
  • Integrated rain cover has your back in a rain storm
  • Ice axe and trekking pole attachments help free up hands
  • Sleeping pad straps and bag compartment free up room in bag
  • Osprey Packs are based out of Cortez, CO
  • Item #OSP007U

210D nylon dobby, 420D nylon shadow box
[x-small/small] 47L (2868cu in), [small/medium] 50L (3051cu in)
Shoulder Straps
Spacer Mesh
Waist Belt
1 zippered top, 2 side stretch, 2 zippered hipbelt
Gear Loops
Ice Axe Carry
Trekking Pole Carry
Sleeping Bag Compartment
Rain Cover
yes, integrated
[x-small/small] 22 x 13 x 14in, [small/medium] 24 x 13 x 14in
Claimed Weight
[x-small/small] 3lb, [small/medium] 3lb 1.6oz
Recommended Use
Manufacturer Warranty

Tech Specs

What do you think about this product?


>Rating: 4

Loved it!

I gave it as a gift but have feedback to share

This was a gift. Here is what she had to say after using it: I’ve used this backpack on 3 trips so far this season and I love it! Initially, I was disappointed that Osprey changed the way the packs were designed - making it more difficult to find a lightweight backpack with pockets, but overall I’m pretty stoked on how this pack is functioning. The internal top zipper on the brain is useful for a lot of different small items, and I love that there is another external zipper on the outside of the brain, perfect for my headlamp, first aid kit, and puffy. One downsides though is that I wish the front outer pocket was made of mesh instead of a zippered one. Historically, I use this pocket for wet items or things that really stink and it’s kind of a bummer to not be able to have that breathability on the front. I guess Osprey tried to mitigate this though with adding a second drop in pocket right behind it. Overall, I highly recommend this pack and I look forward to taking it on the Highline Trail later this summer!

>Rating: 4

Great Overnight to 3 day hike pack

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

I was looking at this pack and Aura for my 1-3 day thru hike trips. I ended up choosing this pack because the fit was more comfortable and it was lighter weight then the osprey aura. I used it on a overnight hike and it was perfect. Just enough space for all the things i needed without over packing. I recommend this to anyone looking for a great pack with suspension and weight is a concern. Great pack for sure!

Two reviews! I love it! Thank you! Leta Osprey Rep

>Rating: 5

Perfect Overnight pack

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

I love this pack because it is lighter then some other packs. I wasn't necessarily looking for a hyper light pack but i didn't want something too heavy. I was debating between this pack and the Osprey Aura 55L and I'm glad i choose this one. It's lighter and the pack is plenty big for all my gear for overnight hikes. I would recommend this to anyone looking for a 1-3 day pack. This is a great pack

Thank you Leticia! Enjoy your Sirrus! Leta Osprey Rep

>Rating: 5

Great pack, just needs to be used!

I gave it as a gift but have feedback to share

I bought the Osprey Sirrus 50L pack for my sister's birthday. She likes that it is lightweight and that the back suspension is really comfortable and breathable. She said the side zipper on the pack makes it easy for her to find items that are hidden in the middle of the pack without having to take everything out. In addition, she finds adjusting the torso length very easy. She is excited to take it on her 4-5 day backpacking adventures.

>Rating: 5

Another awesome pack from Osprey

I've used it several times

I bought this pack as a gift for my sister and she's a huge fan! Just the right capacity to go comfortable for a weekend, or switch gears and go lighter to make this pack work for a 4 or 5 day trip. Fit's as expected and comes in with the quality and durability we've come to expect from all Osprey products!

>Rating: 4

Still working on getting the fit right

I've used it several times

This was the first Osprey product I've bought, and I could tell immediately that it's super high quality. The airflow system for your back felt better than any I tried on in stores, and really works to keep you cool, even if the rest of you is sweating. I've used this for single night trips, multi-night backpacking, and day hikes (used for carrying my small dog for when he gets tired - he loves it, too). I got the "purple" color and it's gorgeous; it is more of a plum/mulberry color but it's still great. Every time I've used the pack I've made small adjustments to how it fits. I'm able to improve comfort the more I use it and figure out how to have it best fit my body. I ordered the xs/s size but was on the fence about which size to buy (I'm 5'6, 115 lbs). Perhaps it would have fit me better out of the box if I'd gone up a size, but I'm wary about getting too big of packs and prefer to err on the small size.

Hi Emma, I am wondering if you should be in the S/M as well. Do you know what your torso measured? Thank you for writing! Leta Osprey Rep

>Rating: 5

Another gem in the Sirrus series

I ordered this after receiving the Kyte 46 and deciding that it didn't live up to the smaller Sirrus pack I had. The fit of the 24L Sirrus is so perfect that I had to send the Kyte back to get the Sirrus50 and I'm glad I did. The frame features a molded and curved bottom where the pack sits on your hips which is super comfortable. Additionally, the tension mesh that keeps the pack off your back and allows for airflow is far superior to the airflow system that the Kyte pack had. I just recently did a steeeeep hike to a mountain lake in ~90 degree weather and stayed comfortable while my guy melted into a puddle with a lesser pack. Adjusting this to fit took a bit of doing because the torso length is adjustable with a velcro system that moves the straps up and down. I would suggest having someone help with getting the fit right and then using only the lower shoulder strap adjustments to get in and out of the pack once you get it right. The shoulder straps have a honeycomb type material that is definitely too scratchy on your skin to wear a tank top, so plan on wearing a top that covers you. If you're like me and your phone is also your camera, don't expect to fit your iphone in the waist belt pockets - at least not in the xs/sm size. I did find that I could easily slide it through the bottom slit in the water bottle holder and reach it while the pack is on without worrying that it would fall out. To maximize the space in this pack for backpacking, I would also suggest investing in a set of origami bowls and plates and sliding them down into the water bladder sleeve - then carry a water filter to fill up a bottle instead of sacrificing room for a hydration system, not to mention all that weight. Also - the ruska purple color is much more of a pomegranate/berry type color than the grape purple it looks like in the picture. Much preferable, actually I really like this pack for 2-3 day outings. The Sirrus24 has been so used and abused that it left me very confident in ordering the 50L version and I'm glad that I did. For reference I'm 5'1" 110lb. and got the xs/sm. I would expect that size to fit a girl slightly taller than I as well, like up to 5'4"ish


Osprey Sirrus Product Tour

Check out the features on the updated Sirrus from Osprey! Leta Osprey Rep


What size would be right for me? So I am typically a Small with 17” waist for backpacks. Would I be a xs/s or a s/m?

Rachel, did you mean to say 17" torso? If that's correct, I would go with a S/M for sure. Happy Trails! Leta Osprey Rep