Like all Speedo swimming goggles, this model also offers 100% UV protection and has an anti-fog coating for clear vision under water. Features - Hydrosity 2.0 Soft seals for long-lasting comfort Double-clamp mechanism for quick and easy adjustment Split strap for a more comfortable fit Molded nose bridge for more freedom of movement and a comfortable fit Wraparound lenses for great peripheral vision Lenses with anti-fog coating for clear vision underwater 100% UV protection against harmful UVA and UVB rays Anti-fog technology Anti-fog Fogging of the lenses of swimming goggles is caused by the different temperatures of the water and the swimmer's skin or eyeball. To prevent fogging, the inside of the lenses is coated with a special material.