Girls' slipper socks in winter penguin design. Super thick fleece interior for maximum warmth and comfort. Non-skid bottoms to prevent slipping and sliding: Silicon rubber grips on soles of socks prevent slips and falls on smooth floors. 100% Polyester. Available for 4-7 year old kids. Fits kids' foot sizes 12 to 6. Feels soft and comfortable throughout, sure to catch the eye and appeal of others.. Great gift for Thanksgiving and Christmas holidays. This timeless design is a very popular choice for Christmas. Machine wash. Tumble dry low.