The BLACKHAWK 3-Day Assault pack is a uniquely designed mid-sized frameless back pack. It has a padded back, padded contour shoulder straps with detachable sternum strap, and padded removable waist belt. The inside back has a pouch to fit an optional hydrastorm hydration system with an elastic covered grommet tube routing system (trs) to feed the drink tube out the top and over either shoulder. This feature allows the user to efficiently carry 2 liters of any hot or cold liquid and drink on the move. The pack has a main compartment, smaller cargo pouch and cargo pocket. This 3-Day pack also comes with sleeping bag straps. Padded shoulder straps with D-rings for equipment attachment. Detachable, elasticized sternum strap with silent release buckle. Compartments are closed by YKK zipper and sliders with silent pulls. Optional hydrastorm hydration system. Made of 1000 denier nytaneon nylon.