This uniquely designed Model 603D00 Blackhawk Assualt back pack is a mid-sized frameless pack. Excellent choice for carrying your military gear, whether you're on a tactical operation or just need to haul your necessary equipment. 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 in the back pack and drink on the move. This Blackhawk back pack has a main compartment, smaller cargo pouch and cargo pocket. The Blackhawk 3 Day Assualt pack also comes with sleeping bag straps.