ACORN Women's Polar Pair Slipper 100% Fabric Suede sole Rib knit cuff for secure comfort. New loftier Acorn memory foam midsole guarantees comfort. Suede sidewall and outsole for soft, yet durable comfort. For those of you that don't want the rubber outsole this is the slipper for you. Warmth on those long, cold winter nights. Unisex sizing for men or women.