Model specifications veloceframe type open lensweight 28 gramsfit large medium smallrx compatibility veloce rx insert adaptor frame features 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