These frames are made from the finest quality TPEE flex-fit material. This flexible material makes our sunglasses incredibly comfortable so kids will want to wear them and keep them on. We’re proud to say they’re virtually unbreakable—“bend ‘em, flex ‘em, you can’t break ‘em.” These sunglasses feature lenses made of optical grade polycarbonate material. Polycarbonate lenses are lightweight, impact resistant and provide excellent optical clarity.