Constructed of rugged tactical polyester. Padded back panel with built-in ventilation channels. 1 large main zippered compartment. 2 side zippered pouches. Padded hip belt. Fully adjustable shoulder straps. Dimensions: 21" x 12" x 6". 25 liter capacity. The rio grande backpack is the ultimate outdoors travel pack. The large construction allows individuals to carry a large amount of clothing, gear, accessories, equipment, survival tools and much more. The rio grande pack is perfect for hiking, backpacking, camping, bicycling and much more.