ZENITH X SAFETY HELMETUOM: Each Description: *POLYPROPYLENE HD EXTERNAL SHELLLightweight external shell with exponential better performance. Excels in impact absorption, especially at lower temperatures( 30C). Resists yellowing and degradation.* Sanitized antibacterial treatment acts as an internal deodorant* Ratchet system with triple adjustment width, height and rotation for perfect, secure fit*New, eco leather chinstrap designed with new, rear adjustmentpoints for a