This product is a eyeglasses strap. Made by premium material, safe, durable, not easy to breaken, can hold your eyeglasses safely. You can use it to glasses on neck or arm, or fix it on the , perfect for preventing glasses fall down when sports, like running, hiking, cyclying, etc. Features - Color: Black. - Material: Polyester. - Size: About 620mm in length, 4.5mm in diameter. - This string would help to prevent unwanted fall of glasses thus to protect them from getting damaged or accidental loss. - You can use it to glasses on neck or arm, or fix it on the , perfect for preventing glasses fall down when sports, like running, hiking, cyclying, etc. - The eyeglasses string holder is very sturdy to hold the frames in place without letting them slip, anti-slip, adjustable. - Made by premium material, safe, durable, not easy to breaken, can hold your eyeglasses safely. Package list: 1 x eyeglasses strap