Eliminate the worry of where you left your glasses Fashionable and lightweight, you can use these retainers with sunglasses, eyeglasses and readers. Made with leather - Sometimes nylon retainers can irritate your neck. These leather cords will instead feel gentle and comfortable on your skin. They also make for a nice gift for anyone who uses glasses. Get a pair for you and one for a friend. They will pay for themselves many times over by saving you from having to buy new glasses every time a pair gets lost.