Contemporary Style, Intuitive Function. A stylish build rooted in years of racing experience, the all-new Fleet helmet offers just as much technical prowess as it does aesthetic appeal. While the Fleet's ABS shell style lines emphasize its performance-oriented shape and high-flow ventilation, what lies on the inside is just as important - a premium dual-density EPS liner that is bolstered by new ERT (Energy Reduction Technology) material that provides a plush feel when worn and may reduce linear and rotational impacts. Strong and durable PC / ABS shell. Patented Energy Reduction Technology (ERT) may reduce linear and rotational impact energy. Premium dual-density EPS impact liner. 9 intake / exhaust vent ports. Flexible polyamide visor with four-point snap-retention attachment. Removable and washable comfort liner and cheek pads.