Darn Tough's Polar Bear Kids Socks are the perfect over the calf socks for winter adventures. These midweight socks feature a fun polar bear graphic, padded shin, and extra cushioning underfoot for comfort. The Polar Bear 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. 49% merino wool, 49% nylon, 2% lycra spandex, machine wash.