The Blackhawk 3-Day Assault Backpack provides versatility and functionality in a comfortable mid-sized bag. Made of durable 1,000 denier nylon, this backpack has a capacity of 2,000 cubic inches and features a spacious main compartment that can hold all your essential items. For additional carrying options, the shoulder strap has heavy-duty D-ring attachment points. You also can customize the way you carry this versatile backpack thanks to the removable sternum strap, detachable padded waist belt, drag/carry handle and padded shoulder straps. The back panel uses an Intercooler Venting System (IVS) to improve airflow and keep you cool in warm environments. This backpack is compatible with a 100-ounce Blackhawk Hydration system and features a reinforced drag/carrying handle for easy transportation.