Darn Tough's Magic Mountain Kids Socks are the perfect over the calf socks for winter adventures. These midweight socks feature a fun unicorn graphic, padded shin, and extra cushioning underfoot for comfort. The Magic Mountain Socks are made of a fine gauge knit that doesn't add bulk to your kids feet and provides cushioning in the shin, ankle, and the foot areas to ensure the ultimate comfort and prevent any discomfort when worn with ski boots. All weather performance: Cool in the summer, warm in the winter. Great for wearing them with your favorite pair of winter, ski, or snowboard boots. Covered by Darn Tough's lifetime warranty: No strings, no conditions, for life. 51% merino wool, 47% nylon, 2% lycra spandex, machine wash.