Acorn Spa Women's Slip-On Slipper, New Lime, 8-9 Broad footbed gives feet plenty of room to relax. Enhanced, raised heel and arch lend stability and support. Memory foam midsole adjusts to the shape of your foot for a custom fit. Polyester upper, upper lining and insole, EVA midsole, thermoplastic rubber outsole. Care: Machine wash cold on the gentle cycle. Air dry.