The Antic Multi Sport Helmet offers impressive protection, fit and style while being light enough to not feel uncomfortable. It's designed to be effortlessly easy to adjust and comfortable thanks to a no pinch Fidlock magnetic buckle and adjustable dial fit system to give the perfect fit. The super lightweight in-mould construction is paired with 6mm comfort padding and 12 air vents across the helmet for maximum airflow. The Antic Multi Sport helmets all go through a range of test requirements to concur with all helmet certifications, the Multi Sport Helmet is AS/NZS, CE, CPSC and ASTM certified making it Scooter, skate and bike approved. Sizing: Small Head Size: 17.3-20.5"/44-52cm. Medium Head Size: 20.5-22.8"/52-58cm.