Osprey's Raptor 10 Hydration Pack carries everything we need to stay prepared, hydrated, and comfortable while out on the trail. Made with Osprey's supportive Atilon foam framesheet and the breathable Airscape back panel, the Raptor easily carries a day's worth of gear and three liters of water in the included Hydraulics reservoir. We love that the Raptor comes with a Lidlock helmet attachment point, a front stash pocket for quick access to spare tubes and trail maps, and a stretch mesh pocket that conveniently stows an extra layer.