The NSC Aerofit Speed Skating Helmet boasts a sleek and aerodynamic design that sets it apart from the competition. The lightweight construction makes it comfortable to wear, allowing you to not feel weighted while skating. Not only is the helmet stylish, but also meets strict safety standards to protect your head during falls or impacts. Whether you're competing in races or just training, the Aerofit's striking look will be sure to turn heads. *Helmets have an adjustable dial on the back, to adjust for the perfect fit. Sizing 54-58 CM = Small/Medium 58-62 CM = Large/Extra Large