Model specifications waspframe type open lensweight 22 gramsfit medium smallrx compatibility directfit frame features the new wasp style from our interchange collection is sleek and offers maximum visibility interchange options make it perfect for multiple activities 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