ALPS Mountaineering Valdez Daypack, Green Green lightweight polyester ripstop; Padded waist belt Vented back allows maximum air flow Rescue whistle buckle on sternum strap; Side neoprene water bottle pockets Front stretch neoprene pocket; Hydration pocket and port Capacity: 1500 cubic Inch/25L; Weight: 2 pounds, 2 ounces; SKU 6101007