Andoer Sports Bike Bicycle Cycling Safety Helmet with Visor Carbon Fiber for Adult (Yellow) In-mold construction fuses the helmet's outer shell, high intensity. 20 vents bring cool air in and flush warm air out, well-ventilated. Made of carbon fiber & EPS & foam, high density, durable and comfortable With removable visor and adjustable strape, head circumference: 57~62cm. Lightweight and portable. Stay safe while cycling with the bike helmet, perfect for on-road and off-road use.