Hydrapak 3 Liter reservoir with detachable drinking tube and slide top large opening for easy filing and cleaning * Large main storage compartment to pack essentials for longer rides * Channeled padding on back allows for air to circulate and regulate moisture * Fleece lined sunglass/audio pocket with audio interface * Cinch down straps and flap on outer section designed to securely carry a helmet Lower cinch straps allow secure storage of full sized armor