Description: Keep Your Glasses Secure: Our glasses retainer is designed to keep a tight grip on your eyeglasses, preventing the loss of the glasses and breaking during movement or sports such as biking, hiking, skiing, allowing your eyewear to be comfortably hung on your chest, or rest on top of your head. Anti Falling design: The glasses strap has an upgraded design, and the high elastic at both ends of the frame strap securely wraps the temples, allowing you to easily perform any operation. When you , you can hang the back of your head glasses strap around your neck without worrying about it coming off. Adjustable System: The buckle slides along the strap to allow length adjustment, so that the eyeglasses strap will fit on any head shape and size. Fits Most Eyeglasses: These ropes for glasses fit for sunglasses, etc. You can easily slip these straps on to your eyeglasses like a sock, convenient to put on and take off. Widely Used: Fits most sunglasses, daily glasses and reading glasses. for everyday use or outdoor sports such as fishing, cycling, skiing, hiking, rock climbing, etc. Specification: Material: Plastic  Size Chart: Adjustable Length: 16.5cm-25.5cm/6.5inch-10inch Package Includes: 1 Adjustable Glasses Strap(4 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.