Made of ultimate comfort premium quality polyester lining and acrylic outer knit pattern or design; Ladies size scale: Small (Shoe Size 6-7.5), Medium (Shoe size 7.5-9.5), Large (Shoe Size 9.5-11); Non slip gripper bottoms make these perfect indoor slipper socks for use on hardwood, tile and other smooth floors; Machine washable on cold or hand wash, air/hang dry; Enjoy lounging in these excellent value soft slippers in the home, office, dorm room or as a gift for a friend or loved one!