Features: Brand new and high quality Widely used on surfing,skateboarding, riding bicycles/motorcycle. The belt is anti-slip design, which is more reliable when it is in contact with the head. High-quality equipment for cycling and other extreme sport photography. High-quality lock buckle, head strap design is more suitable for human body structure, more comfortable to wear. Suitable for most action cameras on the market. Adjustable Elastic Strap.Comfortable, fully-adjustable design fits all shape and sizes. Specifications: Material:PC+ABS+Nylon Type:A/B/C Color:Black Size:Approx.55-65cm/21.65-25.59inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Head Strap