The Knoxville Sunglasses from Electric feature an 6-base mold injected Grilamid frame and 6-base polycarbonate lenses. A 5 barrel stainless steel optical hinge completes the package. 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.