Turn heads wherever you ride, skate, or roll. Dakota is your multi-function bike, skate, and roller-skating helmet with the design to ride in style, and the durability to keep you safe no matter what wheels you're on. Features: 10 vents for optimal airflow Fully-formed ABS shell is lightweight and provides optimal protection EPS foam lining absorbs impact energy Adjustable straps with no-chaffing chin pad Two sets of pads are interchangeable to customize your fit Sizing: Small Head Circumference: 20 in. - 21.25 in. Medium Head Circumference: 21.25 in. - 22.75 in. Large Head Circumference: 22.75 in. - 24 in.