I've used these shoes outdoors for about three short periods, but they show no wear or dirt and are in excellent condition. Size M, 26cm These are介護用 (kaigo-yo, nursing care) shoes made of lightweight mesh fabric that gently protects the feet. - Color: Black - Ambidextrous: Yes - Material: Mesh fabric - Features: Lightweight design, gentle foot protection - Intended Use: For outdoor use Thank you for looking.