VonZipper Maxis sunglasses are handmade in Italy and are crafted from nylon grilamid and metal held together with stainless steel optical hinges. The base 6 impact resistant polycarbonate lenses provide 100% UV protection. Designed in California, VZ offers a lifetime guarantee against manufacturer's defects. All VZ lenses provide 100% UVA and UVB protection, are distortion free, optically correct and shatter resistant.