A silicone seal between the Pinlock Evo anti-fog lens and the helmet's visor forms an insulating layer of air that is intended to prevent fogging of the visor.
Suitable for the following Shoei visors/helmets:
Visor CNS-1 - GT-Air I en II - Neotec
Visor CNS-3 - Neotec II
Visor CW1 - Qwest
Visor CWR1 - X-Spirit III - NXR - RYD
Visor CNS-3C - Neotec 3
Visor CNS-1C - GT-Air 3