HAZARD 4 Rocket(TM) Urban Sling Pack nylon Imported Side pockets for bottles, etc. Relatively large volume will hold bulky items w/ ease & includes generously padded back w/ air circulation pad array Fits up to H&K G36C or MP5 (w/ collapsing stocks), most full-size auto-pistols & M4/M16 w/ lower separated from upper (pad provided to divide) No external air-mesh materials to get damaged/soaked & bag is full hydration bladder compatible (up to 100 Oz./ 3L) Top zip for passing long objects like antennas/rifle barrels; Bottom compression-strap, also secures tubular items & stabilizer-strap links Main Material: DuPont(R) 1000D Cordura(R) Thermo-moulded back panel w/ logo &amp; air-circulation array. Full hydration bladder compatible (up to 67 oz./2 L). Can fit 3 L hydration bladder up to 2.5 L capacity. Large grab-handles for carrying and pulling to chest/back. Trap-door pass for hydration hose w/ large bite-valve cover. Internal mesh zip/elastic pockets for organizing items. Padded shoulder strap with 3-D airmesh for comfort. Stabilizer-strap links to either side and keeps bag from sliding. Top/bottom compression-straps, also secure tubular items.