A high performance swim goggle. The polarized lenses filter out the glare reflected from the water surface. Suitable for triathletes and pool swimmers. Wide angle vision. Anti-fog goggles: These goggles have an internal coating on the lens which inhibits the formation of fog on the inside. This enables you to see more clearly throughout the duration of your swim session.These goggles offer protection for the eyes against harmful ultraviolet (UV) radiation from the Sun. If swimming outside, and especially in summer when the radiation is more intense, then it's advisable to choose goggles with UV protection.