bSoft Women's Footie (B&W Damask, Large) 70% Bamboo Rayon These footies are not a sock and not a slipper, it is a cross between the two, a Footie!! Outside fabric is made of Bamboo Flannel, Interior is a super soft, fuzzy fleece lining. The footies have a non skid sole on the bottom (so you won't slip on the tile or hardwood) Machine wash on cold and dry on low heat Sizes run as follows: Small (5-6), Medium (7-8), Large (9-10). Machine Washable. Matching Pajamas, Robes, and Sleepshirts are all available through Amazon Prime.