Osprey Sirrus 26 Women's Backpack - Tunnel Vision Grey With the wind at your back, the Sirrus 26 is the perfect pack for your next hiking trip! With a classic look and clean design, the Sirrus 26 women's backpack is a favorite for walkers and hikers looking for a backpack with a ventilated back system and plenty of storage for extra clothing, provisions, water and gear. The AirSpeed™ mesh back system is perfectly adapted to the female anatomy. It shines with ergonomically shaped hip belt, shoulder straps, back plate and neck area. The removable and integrated rain cover, which stows in the lower compartment, increases weather resistance, while tough nylon materials ensure high durability. Sirrus 26 features a lid opening with buckle and cord closure. Inside the lid is a large, easy-access compartment, ideal for small items you need quick access to. The generous vertical zippered compartment on the front of the pack also gives you easy-access storage for extra clothing.