A jumpsuit is a one-piece garment with sleeves and legs and typically without integral coverings for feet, hands or head. The original jump suit is the functional one-piece garment used by parachuters.
The original skydivers' jumpsuits were simple garments designed to insulate the body from the cold of high altitudes and minimize risk of covering important handles and grips. Today, however, the garment has found other uses.
Jumpsuits are generally regarded as a garment of convenience, as they are simpler to launder, put on and remove than an ensemble outfit. Unless the jumpsuit has a drop seat, however, it is necessary to remove it entirely for bathroom use.
Pilots and drivers
Aviators and astronauts sometimes wear insulated, fire-retardant jumpsuits or flight suits where other types of clothing can potentially float or flap about in zero gravity or during high-G maneuvers.