The BIRKENSTOCK Kay is a classic clog featuring a convertible backstrap with a buckle closure that can swivel back for a more secure fit. The upper is made from the skin-friendly, hard-wearing synthetic material Birkibuc®. Anatomically shaped cork-latex footbed Upper: Birkibuc® Footbed lining: suede Sole: EVA Details: two flexible straps, each with an individually adjustable metal tongue buckle “Made in Germany”l Specifications: Upper material: Birko-Flor® Nubuck The look and feel of Birko-Flor® Nubuck is an almost perfect imitation of authentic nubuck leather. Insole: Natural leather Footbed material: Cork Outsole: EVA