I'm the other way around. My feet are often cold, but my head stays warm. My latest trip is a good example. Around 15 degrees overnight. I was on an X-Therm, under a Katabatic Sawatch snugged around my neck. My feet were fine, my core was quite toasty, and I stayed warm without any headgear on at all until about 3 a.m., when I woke up with my head a touch chilly. Put on a down balaclava for the remainder of the night and slept just fine.
BTW, didn't know you were one of the original members of DEVO. I used to like your music....