high elastic fabric Adjustable size: You need pull the adjusting buckle to adjust the length (expansion range: about 7.5-13.5 inch) of the glasses holder rope ensure a snug fit around the head so that glasses do not fall off or slide down your nose (Suitable for all people). Widely Used: Fits most sunglasses, daily glasses and reading glasses. Perfect for everyday use or outdoor sports such as fishing, cycling, skiing, hiking, rock climbing, etc. No tailSoft and Comfortable: Glasses straps Made of polyester high-elastic fabric, soft, comfortable, breathable and not tight, it fits the head perfectly, without any discomfort, and will not be caught in the hair; the soft material brings the ultimate comfort. Anti-falling design: The glasses strap has an upgraded anti-drop design, and the high elastic silicone at both ends of the frame strap securely wraps the temples, allowing you to easily perform any operation. When you need a break, you can hang the back of your head glasses strap around your neck without worrying about it coming off. Easy to wear and reusable: After putting on the glasses, insert one of the temple legs into the silicone sleeve, and then finish the other side. Reusable, hand washable, multiple use-use with your glasses every day