Skiing on difficult and challenging terrains needs a sock filled with technically advanced features and providing a fit that feels customised to you. Thorlos Ultra Thin Light Weight Ski Socks are for skiers who wear custom fitted boots and prefer ultra thin cushioning that protects without unnecessary bulk. These ultra thin ski socks are made in the USA using THOR-WICK WARM, an intelligent fibre design that keeps feet dry by wicking moisture and warm, even while being thin and light. The socks have a reinforced, flat knit that is both soft and durable, using a pique stitch in the calf and ankle zones that enhance the stretch capabilities of the Spandex fibres and create a precise fit. Low profile toe seams prevent rubbing and irritation in even the closest-fitting boots.