This sounds like something your grandma would swear by, but it’s backed by science. Lay a sheet of aluminum foil inside your shoes or boots, under the insole. The foil reflects your body heat back at your feet and blocks the cold from the ground. It’s like putting your toes in a tiny space blanket. Just be careful not to make it crinkle too loudly, or people will think you’re wrapping a sandwich during your meeting.
You can also wrap your toes in foil before putting on socks in an emergency. You’ll look like a baked potato, but you’ll be a warm baked potato.
