CLOUDS: 60% polyester 40% acrylic. Long socks and thick. On the outside are of a fabric that looks like wool, and on the inside are full lined with a super soft fabric and warm. They have different patterns of christmas that are really cute, and in addition there is a detail in your edge made of fabric suavecita of which is lined which makes it even more mono. Finally have a non-skid, so that they are optimized to be at home. It is the perfect gift for christmas, because they are super warm and comfortable. They are ideal for warming up the feet in the cold days.