This backpack comes from the Sirrus series of the Osprey brand. This backpack, with a special feminine fit, is equipped with a number of conveniences. The fully adjustable AirSpeed ventilated back system with built-in hip belt ensures that the backpack remains comfortable to wear even in warm weather. The fit is also adjustable, so that this backpack would always fit you like a glove. In addition, the backpack is equipped with an internal water reservoir compartment, a key attachment clip, attachment for an ice axe, a sternum strap with emergency whistle and a stow-on-the-go walking stick attachment. In addition, the backpack contains zippered organization pockets and an integrated and removable rain cover. In short, this backpack has everything you need, for all weather conditions!