ACORN Women's Chinchilla Collar Slipper (Medium / 6.5-7.5 B(M) US, Black/Black) Rubber sole Rich and warm Italian "plush" uppers Fully lined in luxurious faux chinchilla for cozy warmth and comfort Acorn Signature Comfort Sole construction Lofty Acorn memory foam midsole over comfort cushion layer of featherweight EVA guarantees total comfort and therapy for feet