eBoot 12 Pieces colorful nylon braided eyeglass cord sunglasses strap eyewear retainer with 2 pieces black glasses cloth Adjustable rings: There is 1 ring on both sides of the cords, made of rubber, soft and elastic, they are adjustable, you can make it bigger or smaller according to your own needs, thus can fit for both thin and wide glass frames. Useful eyeglass cords: It is suitable for myopia glasses, reading glasses and sunglasses, and you can use it in many different situations, when you are doing outdoor activities, playing balls, doing sports, going hiking or reading books, wearing your glasses with the cord can bring you a lot of convenience. Specifications: Cord length: approx. 58.5 cm/ 23.03 inches Cord diameter: approx. 0.3 cm/ 0.12 inch Cord material: microfiber Cord color: assorted colors Cord quantity: 12 pieces Cloth side length: 15 cm Cloth material: microfiber Cloth color: black Cloth quantity: 2 pieces Packaged includes: 12 x Eyewear cord 2 x eBoot Cleaning cloths Note: These cords are assorted colors in random delivery.