Smaller internal helmet diameter, a thicker padded liner, and a smaller chin strap for smaller heads and faces; Matte Polycarbonate and Advanced ABS Composite outer shell; Two side, two front, one back, and two center stripe vents; Comfort padded harness with synthetic suede lining, hook and loop adjustment, and Fastex buckle; Washable quick-dry, moisture wicking, anti-microbial liner