eBoot 8 Colors Anti-slip Glasses Strap Sports Glasses Strap Holder for Kids, 8 Pieces 8 Colors: red, orange, yellow, green, navy, purple, pink, black Material: durable soft elastic silicone Suitable for children to wear, not suitable for adults Length: 21.5 cm, elastic design allows you to stretch the strap up to 45 cm Suitable for the eyeglasses legs' tail width 8 - 16 mm Made of soft and durable elastic silicone material, non-toxic and odor free. It will not soak up sweat and dirt, and give you a great experience. Elastic design allows to stretch up to 45 cm. Suitable for childrens head size, comfortable to wear. 8 Assorted colors provide you more choices. You can select one to match your intraday outfit and light up your moods. This anti-slip glasses strap are designed for keeping your glasses safe when you are doing sports or any other drastic activities. Reduce the slippage and prevent glasses from falling.