Eyeglass Chains: These anti-slip eyeglass chains are designed to keep a firm grip on your glasses, preventing loss or breakage during movement or sports, allowing your glasses to hang comfortably on your chest or rest on top of your head. Adjustable Design: The eyeglass chains are approximately 32 cm / 12.6 inches long, with a hole size of about two millimeters. The black toggle on the cord adjusts to your head size, pulling it tight against your head so the eyeglass chain fits all head shapes. Hand Wash Only Attachment: 4 Pcs Beaded Eyeglass Chains for Women & Girls Adjustable Eyeglass Chain, Sunglasses Chain, Sports Glasses Strap, Eyeglass Chain around the neck Beaded, Toggle Premium Material: The eyeglass chains are made of premium spandex and a plastic anti-slip buckle, offering good breathability and moisture wicking. The eyeglass chain is elastic and not easily deformed, aged, or broken. Wide Application: These colorful eyeglass chains are suitable for outdoor sports such as running, ball games, and cycling; a perfect gift for anyone who owns sunglasses, reading glasses, or others. Match your different outfits according to your mood. Package Contents: You will receive 4 adjustable eyeglass chains. Our eyeglass chains include 4 different colors: green, blue, purple, black, and orange, which can match glasses and clothes in different colors, making you look more trendy.