BIRKENSTOCK Men MILTON Natural Leather Chukka boot Size 13M 。Birkenstock men\'s Milton Chukka boots, size EU 45. Black suede uppers. Lace up. Gently worn, in good used condition. Insoles are quite clean, hardly any wear. Some grass stuck in soles and other wear. Minor scuffs on uppers. Slight separation between uppers and soles in a place or two. See photos. The BIRKENSTOCK Milton is a simple ankle boot with two-hole lacing. Its excellent flexibility and handmade look, created by a grained natural leather upper, make a real impression. Upper: Natural leather. Sole: Lightweight sole made of synthetic material. Footbed lining: Leather. Anatomically shaped cork-latex footbed. Insole: Microfiber.