Betula by Birkenstock women's sandals in excellent used condition. Size 9 / 40 (EU) Neutral gray / brown metallic color. Cork footbed, soles, and straps are in great condition. These flip-flop style sandals are perfect for spring and summer! Betula®; Licensed by Birkenstock® sandals are built on a platform of cork. Every pair of Betula uses footbeds licensed by Birkenstock that offer tremendous support for all four arches of your foot, resulting in all day comfort. Betula prides itself on making both classic and comfortable footwear with a flair for fun colors and great style.