The Osprey Sirrus 24 is a women’s ventilated daypack with an adjustable torso length. It has lots of pockets to keep you organized, female-friendly shoulder straps, and a seamless hip belt that’s fully integrated with the pack’s back panel. The Sirrus 24 has a clamshell opening that makes it easy to pack and comes with a rain cover to keep your gear dry if it rains.
Specs at a Glance
- Gender: Women’s
- Volume: 24 L
- Pockets: 6, plus main
- Adjustable Torso Length: Yes
- Ventilated: Yes
- Load Lifters: Yes
- Rain Cover: Yes
- Weight: 2 lb. 9 oz
- Max Recommended Load: 25 lb
Pockets and Organization
The Sirrus 24 has a clamshell opening on top that makes it easy to pack or find what you’re looking for in the main compartment. It has two mesh side water bottle pockets that are sized for 1 liter Nalgene bottles as well as an internal hydration pocket if you prefer to use a reservoir. The hydration hose comes out in the center between the shoulder straps.
The pack has a front pocket with a center zipper that is super handy for storing a map or traction aids, like microspikes or crampons. There’s another smaller “slash” pocket on the top of the pack that is good for storing sunglasses, gloves liners, or a buff.
There are two pockets on the hip belt that are designed for storing snacks and small essentials, including smartphones.
Frame and Suspension
The Sirrus 24 has an adjustable length torso so you can dial in a perfect fit even if your torso length falls between sizes. The torso length is adjusted by lengthening or shortening the distance between your shoulders and hips. This is accomplished by raising or lowering the shoulder strap yoke, which is attached to the pack with velcro, and can be slid up or down. It’s pretty rare to find an adjustable torso length feature on a 24-liter backpack since this feature is normally found on much larger and more expensive packs. It’s a big value-add on the Sirrus 24 and can make a real difference in your comfort.
The Sirrus is also a ventilated backpack, which allows air to flow through a gap between your back and the backpack’s frame. This helps keep you cooler so you perspire less and your shirt dries faster. The area behind your back is covered with a suspended mesh netting that is stretched across the pack’s wireframe and forms a trampoline of sorts that rests gently against your back.
The pack hip belt is seamlessly integrated with the mesh netting behind your back and wraps comfortably around your torso, hugging it, and preventing it from sliding down below your hips and waist. The shoulder straps are S-curved to fit around a women’s breasts without pinching and the hip belt is flared to wrap around curvier female hips.
One other thing I like about the Sirrus 24 frame, is that the bottom corners, where you put the pack on the ground, have been reinforced with thicker nylon fabric. I’ve often worn through the nylon on other packs from putting my pack frame on the ground, and it’s nice to see that Osprey has made the pack extra durable at this point.
Compression and Attachment Points
The Sirrus comes with Osprey’s Stow on the Go trekking pole carrying system which I use whenever I need to free my hands for scrambling. There’s also an ice ax loop if you need to carry more technical tools.
The pack has two pairs of compression straps. The two lower side compression straps can be threaded over or under the side pockets, which is handy for securing your water bottles, while the upper two compression straps can be used to lash clothing to the outside of the pack.
Comparable Women’s Daypacks
|Make / Model||Adjustable Torso||Weight||Price|
|Deuter Speed Lite 22 SL||No||1 lb 9 oz||$105|
|Gregory Maya 22||No||1 lb 12.2 oz||$120|
|REI Trail 25||No||1 lb 15 oz||$80|
|Osprey Sirrus 24||No||2 lb 9 oz||$130|
|Osprey Tempest 20||Yes||1 lb 8.5 oz||$110|
|Mystery Ranch Coulee 25||No'||2 lb 11.2 oz||$169|
|Patagonia Nine Trails 26||No||2 lbs 0.6 oz||$159|
|Ultimate Direction Fastpacker 20||No||1 lb 3.7 oz||$150|
The Osprey Sirrus 24 is a super comfortable daypack, even when it’s fully loaded. The hip padding is “just right”… not too thick nor too thin. It cinches comfortably over my hips and never slips down (a common complaint of mine on some packs), but stays anchored in place on my hips right where I want it to be. Once you adjust the right torso length, the super comfortable hip belt and load lifter straps keep the pack close to my frame and well balanced.
I’m also impressed by how much gear you can carry in the Sirrus 24. The pack holds all of the gear I need, including safety gear (first aid, fire starter, spare socks, etc.), to safely hike in warm and cooler “shoulder-season” (autumn and spring) weather. The variety of pockets let me organize and pack my gear by its function, which ensures I pack everything I need before heading out for a hike.
Disclosure: The author owns this backpack.