Premium Material - These Glasses Chain are made of leather, the tough but soft and pliable leather will not fray or break easily, can serve for long time. They are soft and pliable and comfortable to wear. Each neck cord lanyard is strong sturdy and is not easy to break or twist. Right Size and Rich Colors - Each length is 72 cm / 28.34 inch, this length is enough to hold any of your glasses. Glasses strap has 3 colors, namely black, dark brown, dark blue, different colors can match your different glasses and clothes, making you different every day. Adjustable and Non-slip - The Glasses Chain has a movable metal ring end, which can be easily adjusted to ensure a tight fit to the eyeglass arm. They are also soft rubber, so they won't cause any damage to your glasses. There is also a non slip ring on the top, which can be slid up and down to fit your head, making your glasses more firm and comfortable to wear and will not fall off easily. Comfortable to Wear - When you are not wearing glasses, the glasses neck strap can fix the glasses on your neck. You don't have to worry about losing or not finding them when you are outdoors. Not only do you don't have to worry about losing your glasses, but you can also relieve ear pressure. It is comfortable to wear without stress. The spectacle chain holder is designed with adjustable end and anti-slip loop, the glasses lanyard holder can adjust to fit your head perfectly.