pattern, full of design. design pattern, clear and bright, makes your glasses eye-catching enough. Elastic and soft, comfortable to wear. High quality elastic band, comfortable and durable. There is a battery fixing belt, so you 't have to worry about no place to place glasses batteries during the flight. The length is adjustable and flexible. The adjustable buckle can adjust the length freely. The elastic band is elastic and can be controlled according to your head circumference. Nylon Sticker adhesive, strong and durable grip. Colour:red :elastic band Package Contents: 1 x Head Strap Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.