Functional Underwear is one of the main items that you need to have fun on the skislopes without freezing and cooling out on ice cold days.
There are different kinds of functional underwear. You can buy them as a onezie or, top and bottom separate. To get the best and warmest feeling, you have to wear the underwear tight on your body underneath your outerwear on your skin. The special fabrics are made mostly out of spandex, cotton and polyester. The underwear is super breathable and sweatabsorbing. Perfect on cold days whilst hiking to the next powder track, or sitting in a chairlift during a snowstorm.