With the Steinhausen Razor's Edge you get 400UV protection without putting a damper on any of the colors around you. German designed lenses and polarizing technology allow the Razor's Edge to protect your eyes from harmful UV rays while enhancing the view of colors around you. The lenses also reduce glare on water, windows, and other surfaces ordinary sunglasses won't let you see through. The Steinhausen Razor's Edge are anything but ordinary! They are cutting edge eyewear technology that are comfortable, stylish, and will give you an edge over ordinary sunglasses.