I use paint.
On hot days--much cooler than even the lightest face masks.
On cold days--much warmer than that soaking wet face mask once it is saturated with moisture from your breath condensation.
Disclosure: I'm probably over cautious though. When a deer is close, I'll even squint my eyes so when I blink it's not as noticeable. I always wear gloves, every single hunt. Don't pee from my stand, unless it's an emergency. Take way more scent eliminating precautions than almost any hunter I know. Etc. Etc.
