All ro•sham•bo sunglasses lenses are Category 3 in terms of darkness, which falls into line with the European standard for UV protective sunglasses and also meet regulated United States safety standards. Sunglasses with category 3 lenses provide a high level of sun glare reduction and good level of UV protection against strong sun brightness and light reflected off of water or snow. All of our sunglasses also have polarized lenses, which provides 100% protection against UVA, UVB and UVC rays. READ MORE