1. The lenses are made of high quality polycarbonate， and its surface has been through special strengthen process， which is anti-friction. The lens also has a curved design to help you get a wide and clear view. 2. The glasses frame is made of light material and can be folded， which is hardly been broken. 3. Ultra wide elastic band and the design of denser antislip strip， which is able to avoid sliding of the glasses from helmet 4. The glasses belt is adjustable， which is comfortable to wear 5. The soft sponge pad has an excellent flexibility and high elasticity Color: Dark Gray Silver Print Mirror color: Transparent Dimension: about 175 x 100 x 36.7 mm Strap length: (about) 470mm Material: high quality PC lens， rubber goggles frame， 100% pure cotton high elastic strap Size: free size (adjustable strap) Package:1 x Goggle