Harley riders have worn The Original KD's since the 1950's making them the #1 selling biker sunglass in the world. KD's are lightweight, have long slim arms for better peripheral vision, and fit comfortably under a helmet. The frames and lenses are made of impact resistant plastic with fully wired reinforced temples for extra strength and adjustability. All lenses meet ANSI Z80.3 general purpose UV requirements. Check them out in the KD's category.