Details Lightweight, well ventilated and with extended coverage around the temples and at the back of the head, the Axion from POC gives protection optimized for the trail. Ideal for a wide variety of riding styles, the helmet features extended protection zones for extra protection in the areas where most impacts occur. Additional safety features include the patented adjustable breakaway peak that reduces forces transmitted to the neck in a crash. Designed for trail riders, the Axion benefits from channels and vents that control airflow to keep you cool in all conditions. Construction Extended zones around the temples and back of the head give extra protection in risk areas. A patented breakaway peak will snap off in a crash to enhance neck protection and reduce the chance of injury. A lightweight EPS liner gives optimized protection. The unibody PC shell enhances the structural integrity of the helmet. Fit A 360° fit system makes it easy to find a comfortable and secure fit. Ventilation Optimized ventilation Ventilation channels are optimized to ensure airflow and comfort on even the hottest rides. Helmet Size XS = 48-52cm / 18.9-20.5" S = 51-54cm / 20.1-21.3" M = 55-58cm / 21.7-22.8" L = 59-62 / 23.2-24.4" Weight N/A POC Axion Bike Helmet