The Osprey Raven Women's hydration pack is a Premium mountain bike pack with purpose-built features to keep you moving on the trail. Should you flat, crash or bonk, smart access to dedicated storage pockets gets you back in the saddle faster. This pack has it all: LidLock(TM) and full face helmet attachment, a Hydraulics(TM) Reservoir, a roll-out tool pouch for pre-ride adjustments or post-crash fixes. Airscape back panel allows for freedom of movement and ventilation for all day comfort.Airscape Suspension allows dynamic body movement and distributes load across entire back panelAirscape back panel Mesh-covered extra deep ridged foam allows maximum ventilation while keeping the load close to the bodyBiostretch Harness is a bike-specific winged shoulder strap shape provides comfort and stability with soft, breathable spacermesh contact surfaces and die-cut foam ventilationScratch-free heat-embossed zippered slash pocket for sunglasses and electronicsStretch mesh zippered hip belt pockets provide on-trail access for small itemsHydration sleeve with direct zip access and hose path for easy loadingStretch mesh front pocket for quickly stashing extra gearBlinker light attachment and reflective patch for safetyWARNING! High Energy Magnet Could affect the function of electronic instruments like pacemakers or avalanche beacons Swallowing hazard. Not for use by children under four years old. See Osprey Hydraulics(TM) Owner's Manual for more information