In the past, I've tried anti-fog sprays and treatments on my faceshields with little sucess. When I replaced my older helmet with a Nolan (N90), I installed the anti-fog insert, but doubted it's effectiveness. Not any more! Zero fogging, even in the worst conditions, sitting at a stoplight!
Nolan N43 Fog Resistant Insert
Sale Price: $25.95
Nolan N43 Fog Resistant Insert.
Replacement face shields and Fog Resistant Inserts come in a variety of colors