Never Lose Your Glasses Again:Both ends have silicone sleeve can be slipped on and off easily to fix, making your eyeglasses not easy to fall off. Easy to install and remove. Premium Material: The eyeglasses chains are made of natural stone and the stones are strung on a strong metal line, durable with good quality, not easy to break,which can accompany with you for a long time. Wide Application: This eyeglasses lanyard is perfect for sunglasses, presbyopes and prescription glasses; it can also be worn as a necklace, bracelet mask lanyard Fastening: Adjustable The chain of these beaded glasses chains is made of metal, ensuring it is durable and long-lasting. The beads are crafted from coloured glass, each one crystal-clear.