GoPro HD Athlete Alexander Polli wingsuit diving in New Zealand, Switzerland, and Norway. This is proximity flying with a wingsuit and proximity flying in tracking gear (tracksuit) without a wingsuit; 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.

Proximity flying with a wingsuit is recommended only for very trained athletes and is considered a very dangerous sport. Proximity flying in tracking gear leaves even less margin for error and requires a more specific choice of flyable lines—if you get too deep, you don’t have wings to help you get out.

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