This specification covers the general construction requirements of a parachute canopy which is characterized by concentric rings of cloth separated from each other by slots and designated as the ring slot parachute canopy. Intended Use: The ring slot parachute canopy covered by this specification is intended for application where high strength, low opening shock, and stability are of paramount importance, such as the deceleration of aircraft during approach and landing operation, the deceleration of missiles and target aircraft, and the aerial delivery of supplies and equipment.