Proximity flying from a mountainside cliff

Antoine Laporte and friends navigate Croix des Tetes, a mountain of Savoie, France in their tracking suits. Proximity flying in tracking gear leaves almost no margin for error and requires a more specific choice of flyable lines - if you get too deep, you don't have wings (wingsuit) to help you get out. Tracking gear consists of a jacket and pants that inflate with air, which then increases push force when you move your body through the air.