1. All of our products have passed CE certification. 2. Frames are made of TPU. 3. Lenses are made of PC (or PC sheet) materials The lens can be single lens and double lens; Single lens with reinforcing and anti-scratch; Double lens with outside lens reinforcing, anti-scratch and anti-fog for lens inside; The lens can be the spere or cylindrical. 4. Lens color: Clean, gray and any colors are available. 5. Frame color: Full color and double are available. 6. Foam includes single layer, dual-layer and multi-layer. Using high density ventilated as material. 7. Excellent flexible strap adjusts freely; Buyer can select strap which is anti-slip and common; The strap can be printed the LOGO of the customers.