Hot fluffy dry comfortable thin and warm. Anti static electricity keeping your body temperature stable anti-bacterium anti-odor. This is a perfect undergarment for winter sports that keep you dry and comfortable. A perfect item for winter sports such as snow-related sports. Please wear this item daily as well. The insulation works to keep your body temperature stable and keep the cold air out. You'll be warm comfortable and dry. Micro acrylic fiber is used for the surface of this item to keep your body temperature/heat and to avoid static electricity. This item will hold your body warm before you start play sports. The inner side of this item is made of brushed polypropylene yarn that can shut cold air out. This undergarment will keep you warm. It will absorb perspiration so your skin will be always warm and dry. Since it wouldn't leave much perspiration on your skin there wouldn't be much evaporation either. Then your body wouldn't lose heat because of that.