Peeper Keepers are not just ordinary eyeglass retainers. The have a very special patented silicone attachment piece that outperforms all other cords in the industry. They grip securely to any small to medium temple and never need to be adjusted. We have been selling this brand for close to 2 decades and can honestly say the consumer loyalty is something to marvel. People are fanatical about Peeper Keepers and you will be too. The best part is, they are proudly made in the U.S.A.