The tifosi tyrant 20 fototec sunglasses frame is made using grilamid tr90 which is an extremely lightweight and durable nylon material which can resist chemical and uv damage while being bendy and having a low density these tifosi cycling glasses use a hydrophilic rubber for nose and ear pieces which have a no slip fit no matter how much you sweat both the ear and nose pieces are adjustable to enhance a customisable fit give maximum comfort and limit slippage in order to help intensify your