Homebrew01

-25F for 100 miles just seems physically impossible without frostbite. How do you keep your fingers & toes warm enough ?

I rode 2 hours today at 20f. It was fine, and I could have dressed a bit warmer if need be. I didn't need my heaviest jacket or gloves or newspaper. I should tape up the vent holes in my helmet too.

I've tried the chemical warmers inside my booties, but I think they need airflow because they start out warm, but don't stay warm as they do in a pocket.

I wonder if you could seal one up in a water tight bag, then put it in a water bottle to stop it from freezing ?
I've made drinks a few times that are sweeter & saltier than I normally like to drop the freezing point.