Designed with input from World Champion surfer John John Florence, the Knoxville XL S (Sport) is a scaled up version of the popular frame. It features a featherweight, 6 base, mold injected grilamid frame with performance grip nose bridge and temple tips. The 6 base melanin infused polycarbonate lenses provide 100% UV protection and up to 98% blue light protection.Electric Sunglasses are made in Italy and offer a one year guarantee against manufacturer's defects. All Electric lenses provide 100% UVA, UVC and UVB protection, are distortion free, optically correct and shatter resistant.