Wingsuit Flying
Wingsuit flying is the sport of flying the human body through the air using a special jumpsuit, called a wingsuit, that shapes the human body into an airfoil which can create lift. The wingsuit creates the airfoil with fabric between the legs and under the arms. The public may commonly refer to a wingsuit as birdman suit or squirrel suit.
A wingsuit flight 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 unzips the arm wings, if necessary, so they can reach up to the control toggles and fly to a normal parachute landing. (source: wikipedia)