Brightwhite
WKR
I have tried down booties, the ice breaker booties, socks, warm water bottles, hand warmers, warm rocks, etc. So far nothing really works.
Esse quam videri
Hmmm, the booties worked for me. I have the 4oz fill enlightened equipment APEX ones now that I really like, but the wiggys were the warmest I ever tried. For the price, you might give them a shot. They are heavier, but to sleep comfy, might be worth it.
Booties: Warm, Durable & Breathable - by Wiggy’s