Advanced Polycarbonate Composite Shell: Lightweight, superior fit and enhanced comfort "ACS" Advanced Channeling Ventilation System Full front-to-back airflow, 2 intakes and 2 exhausts Pinlock Ready HJ-34P face shield (accepts DKS463 Pinlock insert, sold separately) Interior provides moisture wicking and quick drying function. Removable/washable crown and cheek pads Speaker Pockets for Bluetooth communication The C10 is an all-new competitively priced full-face helmet for riders of all ages that value quality and safety, offering a lightweight superior fit thanks in part to its Advanced Polycarbonate Composite shell that was designed using advanced CAD technology. Combined with a wide-view optically-superior face shield and its improved “ACS” Advanced Channeling Ventilation system that allows full front-to-back airflow to flush heat and humidity up and out, the C10 provides a safe and comfortable ride no matter the conditions. With sizes ranging from 3XS to 2XL, the C10 delivers the same great protection for both youth and adult riders alike.