Osprey Sirrus 36 pack for women is a very popular pack and a part of an award-winning series. It has been updated recently, so here I present the features of the new version.
- New AirSpeed suspension, clearly inspired by Osprey’s anti-gravity system.
- Seamless hip belt construction.
- Integrated rain cover.
- Side zippered access to the main compartment.
What is new in the new pack
- Obviously, the most visible difference is the seamless mesh on the back, on the harness, and on the hip belt.
- Adjustable torso length.
- Front zippered pocket.
- One external zippered lid pocket and one pocket underneath the lid, as compared to two external zippered pockets in the previous version.
- Redesigned side entrance.
Sirrus 36 backpack – description
The previous version was already a great pack. The modifications introduced in the new version are so substantial that it is surprising they did not give it a new name.
The Sirrus 36 pack is a top-loading type, with the classic lid and a collar underneath it. But it also comes with a side zippered entrance, so this is a feature different from the previous version where you have a U-shaped front entrance.
The pack is available in two sizes XS/S and S/M, see more in the specifications below.
Under the lid, you have a mesh zippered pocket, and yet another external zippered pocket is on the lid. This is different from the previous version with two external lid pockets and no pockets under the lid. The lid in this pack is fixed.
One pocket with a vertical zipper is on the front of the pack, this is a new feature mentioned above. Dual zippered pockets are on the hip belt, and on the sides of the pack, you have the usual dual stretch mesh pockets.
One pocket with a vertical zipper is on the front of the pack, this is a new feature mentioned above. Dual zippered pockets are on the hip belt, and on the sides of the pack, you have dual stretch mesh pockets.
The pack comes with a separate zippered bottom compartment for a sleeping bag, and the dual compression straps that run across this compartment are removable. In the same section, you have a single ice tool loop, which should be used together with a bungee tie-off located higher on the pack.
All the packs in this series have dual side compression straps with quick-release buckles, see the pictures. You will use them to compress and stabilize the load in the pack and to fix any elongated object (like walking poles or tent poles) stored in the side pockets. You also have the Osprey’s Stow-on-the-Go trekking pole attachment system, it is visible in the
You also have the Osprey’s Stow-on-the-Go trekking pole attachment system, it is visible in the picture above. It includes a loop on the left side and a bungee cord on the left shoulder strap.
The pack comes with an extra bonus, an integrated rain cover which is stored in a separate pocket completely on the bottom.
In the first description of this pack, they wrote that it was AG-inspired, and I mentioned this in my first article about the new series. Such a formulation is now removed at Osprey’s site, but the 3D tensioned mesh on the back panel is the same as it was in the prototype. So indeed, it looks very similar to their first AG design available in the Atmos/Aura and Manta/Mira series.
This construction is supported by a LightWire peripheral alloy frame. The seamless Spacer Mesh on the harness and the hip belt covers a die-cut foam, this all is very comfortable and it provides a great ventilation.
You have Osprey’s ErgoPull hip belt closure in which the hip belts is directly connected to the back panel mesh. As you see from the pictures, you do not have the classic lumbar padding, it is a seamless mesh there instead, designed to wrap the body.
Apart from the mentioned two different torso sizes to fit your torso length, the pack is also with the torso adjustability. So again, as mentioned above, this is something new in the new model. To adjust the torso, do the following:
- First loosen the load lifter straps.
- Then slide your hand between the back panel and the harness to release hook and loop attachment, see the pictures below.
- Then slide the harness into the desired position. There are indicators to guide you.
- Next, press on the back panel to reengage the hook and loop attachment.
- The pack harness is narrower as compared with the version for men.
- The shoulder straps are designed with an anatomical shape to fit women’s profile.
- The hip belt is shaped and angled to accommodate the difference in women’s hips which are conically shaped and with a larger difference between the waist and hip as compared with men.
See some more details about the complete Sirrus and Stratos series in this video by Osprey:
Specifications & summary of features
This is a great pack and the list is long:
– XS/S: 3.07 lb (1.40 kg).
– S/M: 3.2 lb (1.45 kg).
– XS/S: 2075 cub in (34 l).
– S/M: 2197 cub in (36 l).
- Size (H x W x D):
– XS/S: 24 x 12.2 x 12.2 in (61 x 31 x 31 cm).
– S/M: 26 x 12.2 x 12.2 in (66 x 31 x 31 cm).
- Torso fit:
– XS/S: 13 – 17 in (33 – 43 cm).
– S/M: 16 – 20 in (41 – 51 cm).
– Main: 210D Nylon Crosshatch.
– Accent: 420HD Nylon Packcloth.
– Bottom: 420HD Nylon Packcloth.
– LightWire alloy frame.
– 3D tensioned breathable mesh on the back panel.
- Carry load: up to 30 lb (13 kg).
- Integrated rain cover.
- Top and side access.
- Zippered sleeping bag compartment.
- Fixed top-lid with zippered slash pocket.
- Under top-lid zippered mesh pocket.
- Zippered hip belt pockets.
- Stow-on-the-Go trekking pole attachment system.
- Dual side stretch mesh pockets.
- Front panel pocket.
- Internal hydration reservoir sleeve.
- Dual side compression straps.
- Ice tool loop with bungee tie-off.
- Removable sleeping pad straps.
- 4 colors available on Amazon.
- Osprey’s All Mighty Guarantee.
Summary, rating, pros & cons
In my view, the side entrance in the new version is far less convenient than the large U-shaped front entrance in the previous version. However, this is a relatively small pack, and although such an extra entrance is indeed a bonus, it is not so essential. So, any of the two options is good enough. Please see how I rate this pack:
I hope this text has been useful to you, and if this is so please share it with others. In the case of comments and questions, please use the comment box below. I wish you a pleasant day.