* Adaptive Impact System (AIS) * 12K carbon fiber shell produces an extremely lightweight shell with superior penetration resistance * Impact Energy Cells made of RHEON, the Impact Energy Cells maximize absorption of low-speed linear and rotational impacts, reducing forces transmitted to the brain | Article: FLY Racing Formula Carbon Prime Motocross Helmet, black-grey, Size XS | Article: FLY Racing Formula Carbon Prime Motocross Helmet, black-grey, Size XS, black-grey, Size XS