From the swimming pool to the open water, and any other swim spot, the Gul 7 Seas Goggles come with 3 interchangeable lenses to make a splash in all swim conditions. Yellow mirror - for lowlight, dusk swims Silver mirror - for pool swimming, artificial light or early morning Black mirror - for strong sunlight and bright days Treated with anti-fog coating and UV protection, the lightweight and flexible I-wire frame makes for a great fit and peripheral vision comfort. With 3 interchangeable nose bridges then you\\\'re also treated to a custom fit. Key features choice of 3 interchangeable lenses for different light conditions UV protection gasket seals: soft, flexible and no pressure comfort silicone flexible I-wire frame for adaptive facial fit and peripheral vision comfort custom fit nose piece with 3 interchangeable bridges anti-fog coating supplied in a zip clam shell for protective storage