The Osprey Women's Sylva 12 Hydration Pack is a highly ventilated and lightweight women's specific pack is just the right size for carrying everything you need for an all-day ride. Enjoy the BioStretch harness that offers superior stability in the form of winged shoulder straps that curve just as you do when you're reaching for your handlebars. When things get steamy, a breathable 3D AirSpeed tensioned mesh back-panel means you'll feel the wind coming down your back, ensuring you stay comfortable. Additionally, this pack features front and side pockets that make organizing smaller items easy, a LidLock attachment point secures your helmet to your pack, and a removable rain-cover keeps everything dry should the skies clear up on you. The Osprey Women's Sylva 12 Hydration Pack is everything you're looking for in a hydration pack and more, perfect for mountain biking.