Tifosi eyewear podium fototec sunglassestifosis podium sunglasses are 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 featuring hydrophilic rubber ear and nose pieces for a no slip fit and adjustable ear and nose pieces for a customizable comfortable fit the fototec lens technology auto adjusts to ambient light so your glasses are always right for the conditions features