Hi Sandra, I dive Colorado year around and find that in the coldest water that 7mm mitts and hood seem to do the trick. I don’t have a full mask but outside of the "bite" I feel when entering the water I never notice my face being cold during the dive. As others have mentioned, it is my feet that get cold. I’ve thought about trying down booties to see if they would work better than a couple pair of heavy socks. Ed