Large cargo compartment; separate pocket can be fitted with hydration bladders (one included). Toughest tactical nylon construction; the best material and construction on the market for extra durability; solid construction withstands even the harshest of conditions Easy to use hook & loop on many parts of backpack; MOLLE webbing on many parts of backpack Secure and extremely comfortable; has adjustable waist straps for added comfort [the backpack contours to the shape of the wearer and is comfortable for all body shapes and sizes] Fitted with high quality zippers for durability and ease of use Designed for maximum airflow and comfort with shape-forming, padded back support that breathes Weighs in at just over two pounds for field-proven efficiency and versatility Ultra-padded shoulder straps for maximum comfort In the Box 1X Hydration Backpack 1X Bladder Specifications: Material 1000D NylonLength 11Height 18Width 6Adjustable YesColor OD Green California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov