A thyroid issue? Like what kind of issue?
I have a pretty fast metabolism which doesn't leave a lot of fat on my body... Maybe that's it?

Anyway, I'm going w/ some rag wool mitts and wool liners like some suggested. I'm also waiting on the MLD Rain mitts. I'll keep this updated on how this combo works out. It's currently 48* here in Oakland and just as cold in our apartment seeing as it's in an old converted warehouse. So my hands are cold now, as I'm typing this, not in the mountains.