With the Tokio Super Grip, BIRKENSTOCK developed a clog for occupations that demand a great deal of stamina from the wearers and their feet. Its Super Grip sole results in the ideal rolling motion and is nonslip. A midsole made from EVA cushions every step. The special rubber tread delivers tangible sure-footedness. This stability is further enhanced by the adjustable backstrap. This is something that¿s appreciated by those working in the medical professions and in kitchens and by service staff, all of whom often spend hours on their feet. The sole of the Tokio Super Grip has been tested for slip resistance in accordance with EN ISO 20347:2012. UK Size: 3.5. EU Size: 36