Noble Mount Womens North Pole Indoor Ankle Boot Slippers Imported Cable Knit high quality Slippers; Acrylic body, polyester lining. Warm shearling microfiber polyester lining provides warmth and softness Durable non-skid sole - perfect for hard slippery surfaces Calf length sizing provides much needed warmth and comfort Acrylic body, polyester lining. Size Medium fits up to US Womens Shoe Size 9. Size LARGE fits up to US Womens Shoe Size 11.5