An alternative for people in colder climates: just wear less clothing day-to-day. I generally wear one layer fewer than people around me. It really doesn't take

An alternative for people in colder climates: just wear less clothing day-to-day. I generally wear one layer fewer than people around me. It really doesn't take long for the body to acclimate to it to the point it's no longer uncomfortable. I love my hot showers too much to give them up, so this seems preferable.