Birkenstock Arizona Dark Brown Natural Oiled Leather Sandals, Unisex Dark Brown Natural Leather - thick yet supple leather is breathable, durable and comfortable. Softens with wear. Synthetic sole Birkenstock Arizona Dark Brown Natural Oiled Leather Sandals, Unisex (40 M EU - 7-7.5 US Men or 9-9.5 US Women), Normal/Regular Width. Real leather upper, cork, latex, suede, EVA, metal buckle. Classic two strap style with smooth leather uppers, cork latex footbed, adjustable straps and shock absorbing EVA sole. Cushioning footbed with pronounced arch support, deep heel cup and a roomy toe box. Birkenstock women's shoes are made to be comfortable and supportive.