For a comfortable fit and classic style, slip on the Birkenstock Arizona Birkibuc Sandal. Made with Birkibuc, a sturdy synthetic material, these sandals look and feel like nubuck leather and have a smooth backing that won't irritate your skin. Underfoot, a contoured cork footbed molds to feet with a deep heel cup and roomy toe box to cushion without sacrificing arch support. This take on the Arizona is lined with supple suede and backed with a lightweight EVA sole for shock absorption and traction. These core Birkenstock sandals are finished with dual buckles at the strap for a perfect fit everytime. Synthetic Bikibuc upper Smooth backing Contoured cork footbed Deep heel cup Roomy toe box Arch support Suede lining EVA sole Adjustable buckle straps Made in Germany. Find Your Birkenstock Size Here! Birkenstock Size Chart: Adult Unisex. Size: 39 N/ 8-8.5.