Lightweight composite poly-alloy shell Evolutionary design based on the FX-86R with additional inner ventilation channels with new twin-top exhaust vents Fully removable liner and cheek pads Replaceable screw-on visor Six high-flow ventilation points Computer designed inside and out for optimal fit and comfort Aerodynamically designed shell and visor to enhance airflow Features Youth Liner System; achieve three different youth sizes with one helmet through simple liner/cheek pad swapping. HELMET FX17Y ROCKET GRL L