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 pieces for a customizable comfortable fit vented lenses improve air circulation prevent fogging features hydrophilic vented lens adjustable ear pads tr90 bag case included weight 24g frame type open lens rx options direct fit included l