Copper Fit's ultra soft thermal shirt provides comfortable warmth that won't weigh you down. Ultra-fine brushed fibers and closely knitted seams help block the loss of body heat. Worn on its own or as a base layer, this thermal shirt adds warmth without over-heating. Brushed fabric adds warmth without weight. Moisture wicking helps keep you dry and comfortable. Naturally stretches with your body for freedom of movement. Suitable for all ages.