Supertech Corp Roll-Off GoggleThe injection molded lens ensures nearly zero visual distortion Includes goggle, lens, two rolls of film, mud visor and system Built in silicone Glide Lines keep the film from binding or sticking to the lens Supertech Goggle Lenses are made from high quality, impact resistant polycarbonate materialthe injection molded lens ensure zero visual distortion The Super Lock is a lens locking system that keeps the ABS Vision injected lens secure and sealed