A few years back I bought my first antifog insert. It was a Fog-City one, it had a pretty picture of Casey Stoner on a KTM so I knew it would be all good. I was really happy with my Fog City insert... Absolutely no fog, clear vision, reduction in glare, easy to see at night... I was hooked. So when my new helmet came along I went out and bought a new one, this one was also from Fog-City and once again, no fog, clear vision, reduction in glare... awesome.... I got a new visor recently, which meant it was time to get a new insert .. I got to the counter and you know what? NO FOG CITY!!!!! Just ProGrip... Ah well I figured, its a reputable brand... so I paid it, got it home and put it on my visor...Next morning I wake up, put on my helmet jump on the bike... I think "wow, bit blurry, perhaps I didnt clean my visor enough"... Anyway, get on the freeway... Point into the sun and BLIND!!! Fog, Glare, Smudges, CRAPOLA!!! I flip the visor up and made my way to work with tears in my eyes from the cold...
So the point of my story is.... Always take the protective film off the visor, you wont notice it on there at first, but a bit of sunlight and you will be blind
