Muc-Off Anti-Fog Treatment The Muc-Off Anti-Fog Treatment uses cutting edge moisture absorption technology with an anti-mist formula to create a transparent, micro-thin coating so your ride is never cut short by foggy goggles! The Anti-Fog Treatment lasts up to five days, and if you spray on the outside of your swim goggles or sports glasses, the anti-mist formula will help rain bead off to make your ride that much safer! Anti-Fog Spray Features: Intensive anti-mist formula. Advanced moisture absorption. Lasts up to 5 days. Safe on all plastics and glass. Ideal for motocross and ski goggles, helmet visors, glasses & car mirrors.