Osprey Packs Rev 6 Hydration Pack 100% Nylon Imported 1.5 Liter Hydraulics LT Reservoir provides on the go hydration Rev Series packs feature the Biostretch Body Wrap harness designed to move with you during high activity endeavors. A removable drop down DigiFlip media pocket provides secure storage and quck access to all manner of touch screen mobile devices. Interior Phone compartment: 5 X 3 Dual stretch mesh harness pockets provide easy access to energy snacks and other quickly needed items Features a reverse spacer mesh backpanel which is a highly breathable mesh wrap providing a soft, irritation free contact surface for the ultimate in backpanel comfort