I live in Michigan where it gets very cold. I bought several pairs of these Duofold Long Underware and I love them. They save me a ton of money on my home heating and electric  bill. I keep my furnace thermostat turned way down.  I wear these all the time. They are very soft,not like the cheap stuff sold in many big box stores. Duofold is the best and they last forever if you take car in washing and drying them.  It's unbelieveable how they keep me warm when I walk outside 4 miles everyday in the cold winter when its 15 degrees outside.