This BlackHawk pack is the one you need!  A mid-sized frameless back pack with a ventilating back panel and silent zipper pulls, and has a detachable sternum strap and padded removable waist belt. The inside has a pouch to fit an optional 100 oz. BlackHawk® hydration reservoir system. The pack has a main compartment, smaller cargo pouch and cargo pocket. This 3-day pack also includes 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
• BlackHawk® Hydration reservoir system compatible
• Made of 1000 denier nylon
• Dual side detachable padded waist belt
• Drag/carry handle
  
  Dimensions: 6” X 13” X 20”
  Cubes: 2,240”