www.zappos.com Product Description: * The Micropores PT Alti Arc X8 hardened mineral lens with flash treatment and anti-reflection technology has a protection index of 4. 93% visible light transmission. * Arc Mineral lens is scratch resistant with extra infrared protection. * Offers 100% UVA/B/C protection. * Removable side shields, adjustable temples and 100% UV protection. Remove the side shields around town for a versatile sunglass and a great value. * Perfect for mountain, sea or desert use. Ideal for bright light situations including backcountry skiing, cross country skiing and snowshoeing. Not recommended for driving. * Lens width 54 Nose 24 Temple length 130 * Base 6.