FLY RACING YOUTH KINETIC STRAIGHT EDGE HELMET BLACK/WHITE YS - 73-8630YSDOT approved Durable and lightweight polymer shell Dual density EPS (Expanded Polystyrene) liner Custom molded rubber trim with integrated nose guard Three shells and four EPS sizes provide a precise fit Removable and washable comfort liner and cheek pads absorb sweat while providing ventilation All FLY helmets have TFV (True Functional Ventilation) When in motion air is forced through multiple air intake vents, then passed through aligned vent