The comfy all-rounder! The BIRKENSTOCK Kay clog can be worn flexibly and offers additional grip at the heel if needed – including during boisterous play. The upper is made from the skin-friendly, hard-wearing synthetic material Birko-Flor® in a sophisticated nubuck look which boasts a texture and color that could almost be mistaken for real leather. Anatomically shaped cork-latex footbed Upper: Birko-Flor® nubuck Footbed lining: suede Sole: EVA Details: two flexible straps, each with an individually adjustable metal tongue buckle