THERMOLITE fabric and insulation provides warmth and comfort without weight. Cushioning on the bottom of the foot and shin area make this sock the gold standard for comfort and performance on the hill. We've added just the right amount of targeted padding on the front shin area where skiers and riders often need a little more cushion. And THERMOLITE delivers the warmth when the mercury drops. This workhorse of a sock is a great option for skiers and riders who know that a great day on the mountain starts with a great pair of socks. Still made in Vermont. Guaranteed for life.