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Osprey Bag WS/M / Black Ospery Sirrus 50 Backpacking
Osprey Bag WS/M / Black Ospery Sirrus 50 Backpacking

Ospery Sirrus 50 Backpacking

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The wind at your back. The Sirrus 50 model brings a wind of innovation and quality to the segment of ventilated bags.

Inspired by Osprey's AntiGravity™ technology, the Sirrus 36 pack features a fully adjustable AirSpeed™ back system, which combines the integral construction of the backpanel and hip belt with a highly breathable suspended mesh. This concept makes it possible to increase comfort in hot weather, including when the load is greater. The carrying system of the Sirrus 50 has a specific female shape, with an ergonomic hip belt, shoulder straps, spacer and back panel.

The sober and classic design, accompanied by great comfort of use, makes the Sirrus 50 model a favorite for walkers, hikers and campers who want a daypack that is well ventilated and offers enough space for camping equipment and light bedding, as well as space for an extra amount of clothing when the weather changes. The removable rain cover, made of sturdy nylon, is stored in a pocket at the bottom of the bag. The Sirrus 50 features a flap with double clip and drawstring opening, a large easy-access pocket in the flap and an expansion pocket with zip on the front, ideal for storage a jacket or a change of clothes. The side part of the bag is equipped with a vertical zipper that allows direct access to the main compartment, which avoids having to open the flap. A zippered compartment for the sleeping bag is available in the lower part, with separation system for a good distribution of the equipment. The model is suitable for long days and light camping in spring, summer and autumn.

The Sirrus 50 model is compatible with all Hydraulics™ and Hydraulics LT™ reservoirs.

Weight: 1.6kg

Dimensions (CM): 68L / 32W / 35D

Fabric: 210D Nylon Crosshatch


  • Interior key clip
  • Designed for women
  • zipped pocket under flap
  • Double zippered waist pockets
  • Sternum strap with whistle
  • Single ice ax loop
  • Side compression strap
  • Removable sleeping mat straps
  • Access by the base with zipper
  • Unique zippered side access
  • Zipped pocket on the front panel
  • Vertically centered zip pocket
  • Adjustable AirSpeed™ ventilated trampoline mesh back panel
  • Adjustable torso length
  • Internal hydration sleeve
  • Integrated and removable rain cover
  • Access from above
  • Stow-on-the-Go™ Trekking Pole Attachment