Muc-Off's Anti-Fog Treatment uses the latest groundbreaking moisture absorption technologies. This has resulted in an anti-fog formula that provides a transparent, super-thin coating, meaning you'll never have to stop to wipe your fogged-up glasses. Once applied to your lens, the formula remains active for five days. When applied to the outside of the lens or glass, the formula will repel rain and water. This makes your ride a lot safer! Intense anti-fog formula Advanced moisture absorption Lasts up to 5 days Safe on all plastics and glass Ideal for MX and ski goggles, snowboard goggles, helmet visors, glasses, and car mirrors