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 fittifosi fototec lenses lighten and darken automaticallylenses included light night fototecweight 27gfit s lframe type framelessrx options rx03 adaptorhydrophilicadjustable ear padstr90adjustable nose pads