ADJUSTABLE TIGHTNESS: Fully adjustable length from 23-35cm to ensure a snug fit around the head, meeting different people's need, suitable for both adults and teens(not for kids). So that glasses do not fall off or slide down your nose when you bend your back or lower your body, especially for outdoor activities. You can also use it as a neck strap for glasses, allowing you can hang your glasses on neck.

COMFORTABLE TO WEAR: Made of premium nylon belt, slim and elastic, not easy to deform, comfortable to wear, even you lie down, you won't feel any uncomfortableness.

EASY TO USE: The ends are made of 2 silicone sleeve which is used to attach to the glasses leg ends. Suitable for most glasses, sunglasses, reader glasses, etc.

PERFECT FOR OUTDOOR ACTIVITIES: Perfect for everyday use or for outdoor sports such as fishing, biking, skiing, hiking, rock climbing, etc.

PRACTICAL GALSSES STRAP FOR DAILY USE: Including 3pcs glasses straps, perfect for daily use indoor or outdoor, convenient to use and remove, no more worry of flying your glasses away at outdoor.