Ladies Chinchilla Booties By Acorn®. Rich warm plush is fully lined in luxurious faux chinchilla for cozy warmth and comfort. A lofty memory foam insole is enhanced by a raised heel and arch for stability and support and a non-slip weatherproof outer sole makes these booties safe for indoor or outdoor wear. Machine wash cold and air dry. Women's sizes: Small 5 to 6; Med 6 1/2 to 7 1/2; Large 8 to 9; XLarge 9 1/2 to 10 1/2. SHOES RUN SMALL... IF YOU WEAR THE LARGER SIZE IN THE RANGE, WE RECOMMEND ORDERING A SIZE LARGER.