?Sunglasses Glasses Sports Band Strap Cord Chain This Glasses Sports Band is made from Neoprene (a material used for sportswear wetsuits) and when in use sits at the back of your head for added security when wearing your glasses in sporting activities. Both ends of the straps are running stitched with colour coordinating poly / cotton with the resulting ends designed to push on & grip the glasses arm ends Fabric straps may be hand washed in warm water with a mild soap Note: This Strap Is Not Recommended for Glasses with Thin Wire Arms & Slim Temples