Day 2 Nite Black Glasses With Photochromatic Lenses And Detachable Strap For riders who stay out into the night or rise early in the morning we offer the Day2Nite glasses. The photochromatic lenses change with the amount of available light on a bright sunny day the lenses are smoke to afford protection from the sun. On cloudy days nighttime and early morning the lenses are clear to allow maximum visibility come in a black frame 100% shatterproof polycarbonate lens dense foam padding for an airtight seal against wind and dust exceed UV 400 protection standards; lens filter for maximum UV protection includes detachable strap for versatility and convenience and are lightweight and stylish! These lenses require UV rays to function and therefore may not change under a face shield or inside a vehicle. Order with confidence from the Webs Most Popular Leather Store!