The poc iris dh goggles are designed to optimise visibility by stressing size and angles without comprising fit in order to improve safety the frame is made of flexible polyurethane rather than hard plastic the tear off compatible lens is made of clear and penetration resistant polycarbonate and has excellent optical properties the goggle straps have silicone strips on the inside so that they easily stick to your helmet and don39t slip around to minimize perspiration and moisture the fa