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 nose pieces for custom fit vented lenses improve air circulation prevent foggingweight 27gfit s lframe lens open lensrx options direct fithydrophilicvented lenstr90adjustable nose padbag case includedincluded lenses smoke