Orthaheel Women's Abbey Cable Mule Slippers Rubber sole Built-in orthotic footbed supports your foot and realigns it to a natural position. Soft knit upper feels so comfortable and keeps feet warm. Rubber outsole has a wave pattern tread that provides traction for a steady walk. Acrylic knit upper, polar fleece upper lining, EVA orthotic insole, nylon shank... Thermoplastic rubber outsole. Care: Wipe off with a damp cloth. Air dry.