I bought a polaris snomobile helmet. Its snell and DOT and freaking awesome.
Its air tight ... and if you are fogging your helmet, this one has a double face sheild and it will not ever fog. It also has the coolest breath guard that presses to your nose and gets it all out instead of keep it in and fog the helmet.
Its beautiful ...
BTW I never knew helmets fogged up till I moved to CA and out grew my Maxon snomobile helmet.
In 1992 I bought a maxon snomobile helmet quite by accident. Several years of use and I never had fogging problems. It didn't even have a decent breath guard. Then in 1995 I moved to CA and found out my melon dont fix my maxon anymore. Then I bought a bieffe. From there on I had lots of fogging issues ... never had one not fog when closed up tight till now.
Cool.
Buddha.
Pics or it didn't happen.