Birkenstock YARA women's Sandals in Brown Leather, Available in women's sizes. 3.5, 4.5, 2.5. Upper: Birko-Flor, a very soft & durable material exclusive to Birkenstock Midsole: Cork & Latex support arch Protective edge for toes Deep heel shell Vegetable tanning (without chrome) Free Next Day Delivery & Free Returns on all orders!