The Sirrus 24 is a women's hiking backpack from Osprey. The Sirrus 24 is not only very comfortable, but also very well ventilated thanks to the fully adjustable Airspeed back panel, which allows for air circulation while remaining comfortable to wear. It is adapted to the female body, with a waist belt, shoulder straps and an ergonomic back panel.In addition, the Sirrus 24 features a Stow-on-the-Go walking pole holder attachment system, so that you can attach your poles to the backpack, if needed. The Sirrus 24 model is compatible with all Hydraulics and Hydraulics LT water reservoirs. It also features an integrated waterproof cover to protect your backpack in case of rain. Lastly, this model is lightweight, comfortable and robust!