These stylish sunglasses contain no harmful BPA. The frames are flexible and highly impact-resistant. The decentred lenses have a mirror coating (category 3) and are made of CX material. The frame is nickel free, the screws are made of stainless steel. Throw these glasses on for your next adventure._Reyes CxSinner Sunglasses Sport CxCX: Environmentally friendly, produced frame and lensBPA FREEDecentred lenses made from CX material100% UV protectionChangeable lens systemAnti-slip temple tips and nose padsLens Category: Cat. 3Lens Technics: Oil lens