Originally Posted By pandy
I've bought some Cressi anti fog spray for the visor of my ski helmet, but will be unable to report on it's efficacy until I go skiing in January.

https://www.cressi.com/catalogue/details.asp?id=768


I can now report back on the efficacy of this product. The visor on the left was treated with the anti-fog spray, the other was not.



Giles. Mogless in Paris.