- Familiarity: I've used it several times
Initially tried these on with my helmet and liked the fit.
Used them on the mountain on a cold cloudy day and they worked well. Used them on a cold but sunny day and they fogged up a little but I fixed that by getting a little space between goggles and my Giro helmet, which was blocking the vents.
Used on a full sunny 50 degree day and they worked great. These coal ionized are perfect for spring skiing but I'm fussing th with them on colder (<40degree) days
Helmet goggle combo is something to consider when purchasing.