Wingsuit flying is the sport of flying the human body through the air using a special jumpsuit, called a wingsuit, which adds surface area to the human body to enable a significant increase in lift. Modern wingsuits, first developed in the late 1990s, create the surface area with fabric between the legs and under the arms. A wingsuit may be referred to as a birdman suit, flying squirrel suit, or bat suit.

A wingsuit flight normally ends with a parachute opening, so a wingsuit can be flown from any point that provides sufficient altitude to glide through the air, such as skydiving aircraft or BASE jumping exit points, and to allow a parachute to deploy.

The wingsuit flier wears parachute equipment designed for skydiving or BASE jumping. The flier deploys the parachute at a planned altitude and releases the arm wings, if necessary, so they can reach up to the control toggles and fly to a normal parachute landing.