Product parameters: ·Origin: Taiwan, China, China ·Weight: 380g ·Mini circumference: 54cm ·Maximum perimeter: 61cm ·Temperature: - 20 ℃/+: 35 ℃ Product features: ·Strong ·Simple cleaning ·Can be customized according to customer requirements. Product description: A sturdy ABS housing is used Designed for environments frequently used by teams. The lining is suspended inside by strong and simple clips. The helmet is designed to be durable and easy to clean. No foam or plastic will affect the firmness of the helmet.