ADJUSTABLE RUBBER ANTI-SKID BUCKLE: High-elastic silicone anti-skid buckles at both ends of the eyeglass chain are firmly wrapped around the temples and are not easy to fall off. The rubber buckle of the eyeglass lanyard can be adjusted up and down, making it easy to install on the eyeglass frame. WIDELY APPLICABLE: The eyeglass strap is about 28-inch long, the black toggle switch on the spectacle rope is adjustable, The length of the eyewear retainers can be adjusted according to the size of your head, our glasses holder is suitable for everyone to wear. Adjustable eyeglass chain anti-slip buckle, it can be used for all types of glasses, such as sunglasses, swimming goggles, sports glasses, reading glasses, etc. PREMIUM MATERIALS: The glasses strap is made of premium nylon and silicone non-slip buckle. Not easy to deform, not easy to aging, not easy to break, and durable. 4 COLORS COMBINATION: Our glasses lanyard includes 4 different colors, glasses straps can easily match glasses and clothing of different colors. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.