Wingsuit flying is the art 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 shape with fabric sewn between the legs and under the arms. It is also called a birdman suit or squirrel suit.

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

The United States Parachute Association (USPA) recommends in the Skydivers Information Manual that any jumper flying a wingsuit for the first time have at least 200 jumps and be accompanied by an instructor, or 500 jumps experience to go without an instructor. Wingsuit manufacturers offer training courses and certify instructors.