i've got a sno-x helmet and a modular helmet. the modular won't ice up, as long as the breather tubes aren't plugged w/ice. the sno-x helmet seems to be ok at first in the ride. towards the end of the night, if it does start to fog/ice up, it will continue to do so for me and is a real PITA to keep scraping the lenses w/my gloves all the time. also, the sno-x helmet is colder. all kind of air leaks around the goggles. i really like my modular. the modular even has a sun visor built into it.