Für was ist das gut? Tauchgang mit Motorradhelm und Klamotten

This is the deepest recorded dive for a motorcycle helmet. The helmet is a standard full face Nolan N-34 without the visor. Actual depth reached on the video is over 20 feet (6m). The garment is a standard cotton polyester mechanic's jumpsuit. The footwear is a pair of alpine ski boots. At the end of the footage, you will see how everything floats quickly towards the surface.