Mens 18 Inch Molle Hydration Ready Tactical Gear Daypack Backpack Material: 600D High Density Polyester for durable daily use. PVC lining inside pockets povides protection from water and moisture. Available in Black, ACU Digital Camouflage, Navy Digital Camo, Hunters Camo, Olive Green, and Tan Molle strap system: allows for attachment of external gear; D rings on shoulder straps; Side and "Y" Load compression straps to keep load tight Hydration Ready: rear zippered water bladder pocket with hose/tube pass through hole at the top, fits any sized water bladder Excellent storage: 2 zippered front pockets, 1 large middle compartment, 1 large main compartment, Organizer with key hook strap Dimensions: 18"L x 12"W x 10"D; Padded adjustable shoulder, chest, and waist buckle strap for perfect fit and stability