Patterned design, clear and bright, makes your flying glasses eye-catching. Elastic and soft, comfortable to wear. High-quality elastic band, comfortable and durable. Features a battery fixing belt, so you don't have to worry about where to place glasses batteries during flight. Adjustable length with flexible buckle for a customized fit. Elastic band stretches to fit various head circumferences. Nylon sticker adhesive provides strong and durable grip. Color: Red Material: Elastic band Package Contents: 1 x Head Strap Note: Only the above items are included; other products are not included. Light reflection and different displays may cause slight color variations compared to the actual item. Measurement error allowed is +/- 1-3 cm.