FootSmart Women's Stretchies Slip-On Shoes Rubber sole Stretch neoprene upper expands to ease pressure points on the foot. Lightweight polyurethane insole absorbs shock, reducing walking impact on body. Durable rubber outsole provides superior traction. Care: Wipe off with a damp cloth. Air dry. Material Content: spandex / neoprene upper, Spanco (nylon tricot) upper lining and sockliner, Poliyou insole, thermoplastic rubber outsole.