Orthaheel Womens Melissa Slip-On Mule Synthetic Rubber sole Built-in orthotic footbed encourages foot and ankle into a natural position. Soft synthetic upper features an elasticized strap and adjustable buckle for a custom-like fit. Wave pattern rubber outsole provides durable traction to keep you steady on your feet. Polyurethane upper, jersey fabric upper lining, microfiber sockliner, EVA insole and midsole... Thermoplastic rubber outsole. Care: Wipe off with a damp cloth. Air dry.