Made of grilamid tr 90 a homopolyamide nylon characterized by an extremely high alternative bending strength low density and high resistance to chemical and uv damage hydrophilic rubber ear and nose pieces for a no slip fit adjustable ear and nose pieces for a customizable comfortable fit vented lenses improve air circulation prevent fogging this frame is compatible with the veloce rx adaptorweight 28gfit s lframe type half framerx options veloce rx adaptor