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A women-specific day pack that incorporates ample cooling and an effective suspension system.

The moment you put on the Osprey Women's Sirrus 24 Backpack and feel its mesh AirSpeed back panel successfully transfer the load to your legs, you get overwhelmingly excited, if not giddy for the big hike ahead. Thanks to this pack's tapered shoulder harness, shorter torso length, and narrow waist belt, you no longer associate ten-mile hikes with pain. And since the Sirrus 24 comes in three different sizes, you can find one that's just right for you.

  • AirSpeed suspension combines the rigidity of aluminum stays with a tensioned mesh back panel for effective load transfer and cross ventilation
  • Women-specific Spacermesh hip-belt and shoulder straps ensure your load rests where it should for max efficiency and pain-free hiking
  • Front panel access means you can easily reach everything in your pack's main compartment without unpacking
  • Hip-belt pockets hold your camera, shades, or quick snacks so you can stay in the groove
  • ErgoPull waistbelt closure makes cinching down the belt easy
  • Stow-on-the-Go feature on the left side lets you holster your trekking poles as you walk
  • As soon as the rain starts to fall, deploy the built-in rain cover and keep your load dry
  • Compression straps let you adjust the pack's volume to fit different load sizes

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Osprey Packs Sirrus 24 Backpack - 1400-1600cu in - Women's

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Here's what others have to say...

Is the Summit Blue color accurate? I've seen several different hues of Blue for this pack.

Responded on

Hey Bernice, it's Leta with Osprey Packs. The Summit Blue color is super close, but the actual is maybe a tad brighter than what the picture shows. It's beautiful! I went to my sample room and pulled it up to my computer to check. I think you will love it. Hope that helped!


5 5

Great Day Pack

  • Familiarity: I've used it several times

I've taken this pack up Mt. Whitney, Mt. Wilson and the Inca Trail. It is perfect for day hikes and super comfortable.
The grey color is actually green. Not sure how they decided it was grey.
I used it as a carry on to Peru and it fit nicely under the seat.
I take a 2 liter camelback in the hydration pocket and also a 1 liter nalgene inside. The only issue I have with the pack is that the hydration sleeve can be hard to get to if there's anything in the top pocket. I had some frustrations wrestling with that.
The main pocket can seem small, but I've stuffed a ton inside. No problem getting all your layers in for a long day.
I also love the stow-n-go feature for your trekking poles. I don't use my poles often but always carry them with me. When they are secured on my pack I don't even notice they are there.
As far as fit, I am 5'8, 150 lbs. I measured my torso at about 20 inches and the small/medium fits me just fine.

I want to buy this bag for my girlfriend. She is 4'11" is it fairly safe to assume the xs/s would fit here best?

Responded on

Hey Chris,

Depending on torso length, the XS/S will be the best option.

Osprey will also most likely be the best company to look at for a smaller pack for her torso.

Shoot me an email anytime you have questions!

Jared D.
Expert Gearhead

4 5

nice but...

  • Familiarity: I returned this product before using it

I got this for my wife for an upcoming trip to Europe. The idea was for me to get a larger size bag that I could check and for her to get a smaller size we could carry on with a few days worth of gear in case something happened to my checked bag. The size was nice for a a carry on, but didn't like the arch in the back that, while increasing air flow, seemed to limit the useful space for packing things inside. The design is nice, just didn't fit our particular need. We upgraded to the 36L Kyte, which may be pushing carry on size limits when full, but seems to have more useful space.

5 5

Most Comfortable Pack

  • Familiarity: I've used it several times

I love that it doesn't sit right on your back allowing air to flow through. I tried on several packs and this one fit best for my 5'-5" frame. I have narrow shoulders and it doesn't hurt at all.

1 5

A disappointing shopping experience

I got a defective product! This shocking shopping is really terrible. a bagpack no guarantee card. have a broken zip..........., although the customer nice and pantient. but seems I have no other way to solution. this is my first buy in this site. and the last !

A disappointing shopping experience
Responded on

Hi, Sorry about your bad experience, sometimes defects happen, but don't give up on Backcountry! I have shopped with them for years and they always correct the situation promptly with a replacement or refund. Backcountry Rocks!

Responded on

Defects happen. Not Backcountry's fault. Great web site. They always fix the issue without question.

Unanswered Question

For anyone who tried both, how does this...

For anyone who tried both, how does this compare with the Osprey Mira ? I'm debating between the 2 of these as a gift for my wife for mother's day. It will be used for day trips with the kids (zoo, theme park etc.).

5 5


  • Gender: Female
  • Familiarity: I've used it several times

I am 5'5", 130lbs with a 29" waist and 17" torso. I ordered the small. This bag fits perfectly from my shoulders (rare pinching) to my waist where the waistband settles just above my hips. The aquamarne is not available anymore, but the colour is more of a teal that aquamarine (to my happy surprise). It is very light even with gear and a full 1L nalgene bottle. The waistband has convenient pockets but they aren't the easiest to open. I don't use a water bladder. I am a geologist and the storage, weight, and compartments are perfect for hiking and climbing. I highly recommend it!

What's the right size for someone 5'5" and...

What's the right size for someone 5'5" and ~130lbs?

Responded on

I'm the same size and Osprey packs fit me best in a size small. Medium would also work.

Responded on

Your height and weight don't matter as much as your back and waist measurements.
Measure from the big knobby vertebrae at the base of your shoulders to the middle of your sacrum(the flat bit at the middle of the back of your pelvis).
If you're 17< I'd go for the S/M
If you're 16> I'd go for the S/XS
(I'm serious, it's VERY small, I usually wear an XS(I'm 17in) and I wear a S/M in this pack)
On this pack, the waist measurements are a little off and don't really matter 'cause they top off at the same size and it's not interchangeable, but the measurements are:
XS/S: 24<
S/M: 26<
But I'm 25in and the S/M fits me nearly perfectly.

5 5


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

I've never provided a product review before (though I rely heavily upon them during my decsion making process) but am so head over heels with my Osprey Sirrus 24 Pack and my exceptional customer service experience I felt compelled to contribute one.

I'm a beginner hiker who live in the Souther Adirondacks of New York. About 13 hikes under my belt including two high peaks. I've had a heck of a time finding a suitable day pack. I'm short (5'2" and about 160 lbs) with a small torso. After purchasing, using and returning two day packs (Kelty and Merrill) I was pretty frustrated. After much online research, frustration with the decision making process and procrastination (because of some hefty price tags) I happened upon the website. What a terrific resource! I was able to limit product searches to specs unique to my wants/needs. That made the search so much easier. The detailed product descriptions, product videos and customer reviews provided additional critical information. Best of all was the personalized customer service provided to me by Backcountry's customer service rep by phone. My rep was incredilby friendly, helpful and arranged for the product to be delivered by air the next day for next to nothing! WOW! I used the pack on today's hike. OH MY GOD. Perfect! No chaffing of skin, no pressure points, extremely lightweight with excellent air flow/ventillation (this pack comes with a light frame). Soooo many zipper pockets, creative stow away features. There is a place for everything on this pack. It is beautifully designed, high quality and provided me with total support and comfort while hiking. I was nervous about spending $100 on a day pack. After using it just once -- I know this money was well spent. No regrets. PS everyone of my hiking friends "ooohed" and "ahhhed" over my pack. One wants one herself! FIVE STAR PRODUCT/FIVE STAR COMPANY!

2 5

Uncomfortable fit

I was super excited about this bag, since I'm going to be travelling to Asia this summer I wanted something small and portable to carry my few essentials every day. But no matter how I tried, this bag rested on my neck muscles, not my shoulders. The shoulder straps are attached to the bag way too close together, and all the weight of the bag rested at the base of my neck. After a 2 day practice run with it, I had to return it. I adjusted every strap, I even had 2 other women try to make it work on them, and none of us could get it to fit comfortably. It is incredibly functional, and worked great for carrying the things I needed on my 2 day practice run, so if it fits you this bag is great. It just didn't work for me.

Responded on

You want to have the hip belt fitted so that most of the carry weight(seriously, like 90% of it) goes on the hip belt, the shoulder straps of a properly fitting backpack mostly serve as stabilisers so the pack stays close to your back.

5 5

love love this pack!

I can put my touring skis in the side & strap the tops together & snowshoe up areas that are tight to tour up. I did have to add an elastic to keep my shovel on the back bottom piece, but that works great now. I love the mesh back to keep my back from sweating. lots of room, I am very happy with this pack

love love this pack!
Responded on

Hello Janet! Loved to hear that you use this pack in the backcountry, as that is my pursuit. Perhaps next time you're out and have the inclination, do you mind posting a picture of the added elastic for the shovel and ski set-up on the pack? No worries if you don't get to it :) Thanks for the great review and have fun out there!

5 5

Spot on!

  • Gender: Female
  • Familiarity: I've used it several times

When I saw this pack online, I was disappointed to find that NO sporting goods stores in my area had one in stock, so that I could give it a rigorous fondling in person. But, since your site has always been a breeze to work with, and you could get it to me in two days (for FREE!), I decided to give it a whirl, since I had a little mountain adventure planned without the appropriate pack.
When I opened the box, I was THRILLED with the overall look and design of the pack, but after having taken it on it's maiden voyage snowshoeing, you would have to tear it from my cold, dead hands to get it away from me.
It's a great size, EXTREMELY comfortable to wear, and wonderfully adjustable.(And did I mention that it's gorgeous?) Living in the Pacific Northwest, I know the time will come when I will need the extra slick integrated rain cover, and although I hope never to need it, the chest clasp that doubles as a safety whistle is a smart touch. The shoulder straps are molded perfectly for the female physique and nicely padded for comfort. I am 5'8", my torso length is 20.5", so I got it in Large. Loving it!

4 5

Not perfect, but very comfortable

  • Gender: Female
  • Familiarity: I've used it several times

I'm keeping this pack simply because it fits so well. I'm not a fan of the compartment layout - I liked the Black Diamond Pulse better, but it didn't fit at all. I wish the Sirrus had that outer stash pocket on the back, and bigger water bottle pockets on the side. Stuff in the top small pocket gets caught up when you try to put a hydration reservoir into the sleeve. I bought this pack for longer day hikes, and now I use it even on short ones because it rides so well. The mesh back panel keeps me from getting too sweaty, and the weight balances nicely. Ultimately, comfort is what matters, and this pack is very comfortable. I am 5' tall, 113 lbs, and I got the small.

Four months later and the organizational layout finally irritated me enough to return the pack (thanks to's generous return policy!). The buckles to get into the main compartment were hard to operate with mittened or cold hands, and I prefer more organizational options.

I found (here) the Mtn Hardwear Wandra (another mesh-backed women's pack with a raincover) that has better access to the main compartment, more external pockets, and that lovely stash pocket on the back. It also has a system for carrying trekking poles across that back that is an improvement on the under-arm thing the Sirrus has going. I look forward to using this pack on my upcoming trip to NZ!

Does anyone own this bag in aquamarine? I...

Does anyone own this bag in aquamarine? I like the color of it on this site, but the same bag on amazon and rei have a completely different (but similar to each other) tone... it's like a blue/grey and not so bright like the one seen here. What color is actually right?

Responded on

The aquamarine color is closer to what is on Amazon. Amazon has it a touch dark, but it is no where near as fluorescent blue at it is here on Sorry.

Responded on

The aquamarine color is closer to what is on Amazon. Amazon has it a touch dark, but it is no where near as fluorescent blue at it is here on Sorry.

Does anyone own this bag in aquamarine? I...

Does anyone own this bag in aquamarine? I like the color of it on this site, but the same bag on amazon and rei have a completely different (but similar to each other) tone... it's like a blue/grey and not so bright like the one seen here. What color is actually right?

5 5

Great Pack

I've used a small camelback pack that allowed me to carry the essentials and a liter of water for the past few years. After purchasing an Osprey, lets just say I'll likely never purchase a camelback again.

I purchased this pack to do a couple of long dayhikes where it was necessary to carry more water and snacks on the trail.

The pack fits nicely. I actually have a shorter torso for my height, but the larger size fits better for this pack. It's comfortable, and I love the ergonomic hip belt (nice to be able to adjust as I add/remove layers)

I love how I can carry everything I need for long dayhikes, or I can use the straps to compress the pack size making it less bulky. I also attach plenty of things to the straps that I either want quick access to (like my microspikes, hat, etc.) or at times I need my snowshoes but not the entire trip I can strap them and leave them hanging on the side.

There are plenty of pockets, and on my short day hikes, I don't even use all of them. On longer ones they are great for stashing granola bars, crackers, etc. I often use one of the side mesh pockets to carry an apple, orange or another piece of fruit as it seems to survive longer there. The Nalgene bottles fit in the pockets, although it is hard to place the bottle back in with the pack still on your back.

The one thing I don't like about the pack is the trekking pole attachement. Perhaps my poles don't fold up small enough, but I'm not a fan of having the poles right underneath my armpits. If I'm not using them I'm fine with either strapping them to the back of my pack, or carrying them in my hands.

5 5

Cute and Comfy

Love the look, love the comfort (the back support is amazing), love the size. The perfect day pack for my 11 month, 11 country backpacking trip!!