Osprey Sirrus 24 Pack - Women's hiking backpack in Daly City Share this listing, “Osprey Sirrus 24 Pack - Women's hiking backpack”, with your friends Buyers also looked at With an Airspeed suspension back panel made of mesh, the Sirrus 24 is also one of the best backpacks in its category for ventilation. Sirrus 24 brings true innovation and quality to the ventilated pack world. Shipped with USPS Priority Mail. The Osprey Sirrus 24 Women’s Pack is a classically designed daypack with modern enhancements for breathability and maximum organization. This allows for increased comfort in warm weather, even with a heavy load. It has lots of pockets to keep you organized, female-friendly shoulder straps, and a seamless hip belt that’s fully integrated with the pack’s back panel. Inspired by Osprey's AntiGravity™ technology, Sirrus 24 provides a fully adjustable AirSpeed™ ventilated back system which combines the single piece construction of the backpanel and hipbelt with highly breathable suspended mesh. Osprey sirrus 24. The Osprey Sirrus 24 is a women’s ventilated daypack with an adjustable torso length. The supremely ventilated, featured and durable Sirrus® Series receives a makeover that is more than skin deep for Spring 2017. Built out of super burly 210D nylon fabric, the Sirrus 24 is designed to handle whatever you throw at it. Condition is Used.