The inner fabric is fur, so it should be suitable for the cold season. You can probably wear them like socks. Synthetic leather has been used for the sole to prevent falls. - Design: Floral pattern (red, blue, green) - Materials: Outer fabric: cloth, Lining: fur, Sole: synthetic leather - Size: Free size (specific size unknown) - Use: Indoor slippers Size 25.5cm Warming your feet from the bottom up is a good idea. This is a handmade item, so it is not perfect. Thank you for looking.