The Vista Pro Smoke Swim Goggles give you better vision and a more comfortable fit. The smoke lenses make them perfect for brith summer days, and the Vista Pro buckle system makes for more stability and comfort. The Vista Pro lens material is an optical grade of polycarbonate, featuring Vista anti-fog coating. The lens gives you 100% UVA and UVB protection to keep you safe. The goggles are surrounded with a leak resistant silicone skirt to make sure you always have clear, leak free vision.