The Kay Pro offers all the advantages of Birkenstock's classic Tokio and Boston models in one. The upper instep strap can be folded back if required, thus providing additional support as a backstrap. The sole is nonslip, promotes the ideal rolling motion, and is also oil- and grease-resistant. The EVA midsole in the leather version has additional soft padding that reliably and permanently cushions the foot with every step - even if your feet are sensitive. This high degree of flexibility and sure-footedness is in great demand in particular in medical environments.