Dirty Dog Cycle helmets are designed for maximum safety when you need it most. Constructed with a protective dual outer shell made of Polycarbonate. These shells give the helmets durability, weather resistance and are easy to clean. Underneath the outer shell is EPS (expanded Polystyrene) which makes up the bulk of the internal mass of the helmet for the absorption of impact and temperature control. The ergonomic design of Dirty Dog helmets eliminates wind resistance enabling you a smooth unhindered ride. Specially designed vents allow maximum airflow for ventilation to minimise moisture build up. FEATURES • Advanced Rear Retention Adjustable Fit System • Heat Sealed Removable and Washable Interior CONSTRUCTION Lightweight In-Mold Technology. High density EPS (Expanded Polystyrene) Two layer PC (Polycarbonate) Shell STANDARDS EN 1078 / CPSC