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Osprey Sirrus 36 Litre Women's Overnight Hiking / Daypack with Raincover


Regular price $349.95

Tax included.

When day hikes stretch out into more committing endeavors, the Osprey Sirrus 36 women's hiking pack is the perfect in-mid-size option. Its top-loading design, topped by a fixed top lid, helps make packing a breeze. Plus, with its highly ventilated AirSpeed® suspensions system and just enough volume to empower your bigger pursuits, it inspires long days and lightweight nights exploring our more rugged trails, rain or shine. Made with 100% recycled materials.

Key Attributes


Injection-molded suspension system w/ 3D-tensioned mesh provides breathable support.


Taller, wider frame geometry combines with tailored adjustment system to extend fit range.


Made with sustainable bluesign® approved materials.


  1. Included raincover made with PFC/PFAS-free DWR and bluesign® approved materials
  2. Zippered front stash pocket
  3. Dual zippered hipbelt pockets
  4. Side stretch mesh bottle pockets
  5. Internal hydration sleeve with hose port in backpanel
  6. Stow-on-the-Go trekking pole attachment with new soft-touch tubes
  7. Dual side compression straps
  8. Single ice axe loop with bungee tie-offs
  9. Front panel lash loops for attaching extra gear
  10. Top loading design with a secure drawcord closure
  11. Fixed top lid with large main compartment and underlid zippered mesh pocket with key clip
  12. Hidden vertical side zip access into main compartment for quick access to contents
  13. Zippered access lower compartment with a floating liner keeps contents organized and accessible
  14. Accessory straps on lower front panel are perfect for pads or blankets

Carry Information


  • Injection-molded ladder adjustment system provides 4" of torso adjustability
  • O/S per gender design delivers great fit and allows for quick, easy adjustment
  • Taller, wider 4 mm powder coated LightWire frame enhances fit range


  • 3D-tensioned breathable mesh backpanel ensures supportive fit
  • New design increases ventilated area up to 40% over our previous design
  • New yoke design ensures consistent fit at any setting


  • Highly ventilated die-cut EVA foam is wrapped in wide spacer mesh for outstanding comfort in all weather conditions
  • Adjustable sternum strap with rescue whistle


  • Ventilated die-cut EVA foam is covered in wide spacer mesh for outstanding comfort in all weather conditions
  • Large zippered pockets provide secure access to small essentials on the trail
  • ErgoPull closure provides leverage to ensure snug fit and optimal load transfer

Volumes and Weights

US and International weight and volume specifications

Size liter kg.
One Size
36 1.431


66 cm high x 31 cm wide x 31 cm deep

Key Fabrics used:
  • MAIN: bluesign® approved 210D recycled honey comb nylon, PFC/PFAS-free DWR
  • ACCENT: bluesign® approved 420D recycled nylon, PFC/PFAS-free DWR
  • BOTTOM: bluesign® approved 420D recycled nylon, PFC/PFAS-free DWR

Sizing and Fitting of your Osprey Pack

Fit is the key to pack performance. Take the time to get it right. Most Osprey packs are available in multiple sizes to fit a range of torso lengths. To find your torso length, have a friend measure your back along the spine (as shown in the picture below) from the level of your iliac crest (the top of your hipbones) to your C7 (the knobby bone at the base of your neck).
Use the table below to determine your pack size.
Sirrus 36 Litre Backpack One Size
Back Length 15-19"/38cm-48 cm