Made with ultimate comfort premium quality polyester lining and acrylic outer knit pattern or design. Keep feet warm even on the coldest of days; In warm climates too where air conditioning keeps floors cold. Each pair of slipper socks has a non skid sole so you can feel safe wearing them on wood or tile floors. Machine washable on cold or hand wash; Gentle dry (do not tumble dry) and do not iron. One Size fits most; Suitable for Women's Sizes 5 to 10.