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 K3 XSL DKS461