Winter can be harsh. Cold air, wind chill, and snow can make daily life hard. If you work outside, go hiking, hunt, or serve in the military, you know how fast your body loses heat. That is why Thermals Underwear  is so important. Thermals are not only regular underwear. They are a smart base layer made to trap heat and keep your body warm.The right pair can make a big difference. Let’s look at the seven fabulous features that make thermals a must-have for cold weather. 1. St