Eyeglass Silicone Chain [New, Unused] Black & Brown 1 Black 1 Brown, Total 2 Easy to attach, simply insert the ends of the strap into the holes of your glasses. Secure fit even during vigorous activities! These are silicone eyeglass straps. A convenient item to prevent your glasses from slipping, falling, or getting lost during exercise, etc. Photos 2, 3, and 4 are from the purchase source. The brown color is lighter than in the photos. Eyeglasses Silicone Chain Strap