Discount 100% S3 Sunglasses Crystal Grey Frame HiPER Galaxy Ruby Mirror Lens are made with Grilamid TR90. This is a popular material for sunglass frames because this polymer has long-term resistance to UV rays, which keeps the frame colors from fading. Most important, this material is less likely to snap or break on impact and will absorb shock. Both frames use ultra-grip rubber for the nose pads and at the tips of the arms to help the glasses stay on the rider’s face. These rubber grippers also hold the glasses where they need to be if they get wet or covered in sweat.