Birkenstock Professional QO 700 O2 Natural Leather Work BootsBIRKENSTOCKs QO700 work 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 QO700 is presented as a modern, ankle high sneaker with 7 hole lacing and a heel loop. The nonslip and oil and petrol resistant outsole provides for energy absorption around the heel. The upper is made from water resistant smooth leather