Anon Rodan Helmet blue eu 2018/19 In-Mold Shell - lightweight polycarbonate shell with EPS lining for best comfort with a sleek, low profile Passive Ventilation - the passive ventilation ducts integrated into the helmet draw fresh air from the front and remove moisture from the back. These built-in ducts help keep your glasses free of fogging by the Expedition Fleece and Ear Pads.