The fly racing 2017 kinetic invazion junior mx helmet is packed with featuresspecifications includedot approvedpoly alloy shell combination of high strength poly materials create a durable light weight shelldual density eps liner two layers of eps expanded polystyrene one softer and one slightly harder combined to provide more progressive impact absorption for different levels of impactremovable liner and cheek pads keep you looking clean help extend the life of your helmet and ar