The Pinlock« creates a double shield system through a silicon seal between the helmet face shield and Pinlock« insert lens, which makes up a double glass type of solution that prevents fogging The insert is made of a moisture absorbing plastic and therefore, the surface basically dry when used The air-tight pocket ensures that the difference in temperature becomes significantly lowered The Pinlock« insert absorbs moisture on the inside and offers you continuous clear visibility. LENS PINLOCK AGV TRMD DKS287