Worn once. Like new. QO 400. Size 37. BIRKENSTOCK’s QO400 safety shoe with a removable footbed offers firm grip and takes the strain off your feet, allowing you to stand and move around comfortably at work for many hours, even in demanding environments. The QO400 has no lacing and is presented as a simple slip-on shoe. The nonslip and oil- and petrol-resistant outsole provides for energy absorption around the heel. The upper is made from water-resistant smooth leather (WRU) and offers antistatic protection. The shoe is certified in accordance with EN ISO 20347:2012 and meets the requirements of protection category O2.