The Katana is a traditional cylindrical lens goggles that is incredibly lightweight and feature packed for a reasonable price. The Katana is a medium sized frame and comes with two lenses. The interchange system is quite quick, utilising a lever on the side of the frame to eject the lens out and lock the lens in. The spare Storm Lens that comes with each colour is an awesome low light lens. Perfect for whiteout days around the world. Features 2 Zeiss Lenses Waterproof Antifog OTG compatible Out Of Katana Ski Goggles