Aqua-Speed Blade Mirror Swimming Goggles, col. 51 Properties: curved lenses made of durable polycarbonate provide a great field of view the seals are three-dimensional and adapt to the shape of the face UltraFUSE technology comfortable seals made of soft material double strap for stability of the goggles UltraFast strap adjustment system the mirror coating is responsible for protection against the sun UV filter Anti Fog coating