Lixada Mtb/Road Cycling Mountain Bike Bicycle Adjustable Helmet 25 Vents Ultralight Integrally-molded EPS for Skating&Outdoor&Sports Lightweight integrally-molded EPS bicycle helmet. 25 vents bring cool air in and flush warm air out, well-ventilated. Soft removable, washable, antibacterial pads for best wearing comfort. Rotary internal regulator adjusts the tightness of helmet.