The tifosi hagen polarized sunglasses have a grilamid tr 90 that is a durable and light weight nylon material that has a high resistance to uv and chemical damage the hydrophilic rubber on the nose and arms pads will ensure a comfortable fit and preventing slippage these tifosi sunglasses have polarized lenses that feature a polarised material embedded within the lens instead of just a thin polarized layer that can easily rub off and fade over time these lenses provide you with 10