Perfect for Any Glasses Our eyeglasses retainers are suitable for most types of glasses, including eyeglasses, reading glasses, and sunglasses. Adjustable Lengthwith two sliders for adjusting the wire length to achieve tail free wearing. Extend the wire length by pulling the ends of the silicone tube with hands simultaneously, or shorten the wire length by holding two sliders and pushing them to both sides simultaneously. Securely RetainSnugly fit and tough, this eyeglass retainer can securely keep your glasses on, no more worry about the glasses sliding off the nose when sweaty or looking down. Perfect for adults/kids who wear glasses while running or playing sports. Soft and LightweightMade of soft silicone material, these glasses strap is ultra-comfortable and soft on the ears, and nicely keep glasses on during sports or playing among kids. It is flexible enough that allows you to slide glasses off your eyes easily while reading/doing close-up stuff. ApplicationGlasses can be worn around the head or hung against the neck with this secured retainer, convenient for everyday use, perfect for the water/amusement parks, beach, or anywhere you're afraid you might lose the glasses. No more worry about losing the shades/glasses in a sudden burst of surf at the beach.