Constructed with heavy duty Polyester, Ripstop and PU water repellant hydration pack. adjustable unisex sternum strap, padded shoulder and back panel with air mesh to keep you cool and dry. a front pocket with audio outlet, key holder and a D-ring for gear attachment Featuring a main zippered compartment that comes with a 2L (H20)hydration bladder, twin shoulder hydration duct exit Includes an elastic pocket in the main compartment to store supplies such as energy bars or a wallet and a bottom m. Complies with FDA. 3" D x 11" W x 18" H