Birko-Flor (Synthetic) – Not Real Leather. Synthetic sole Synthetic upper with leather-lined cork footbed. Birkenstock Arizona 2-Strap Women’s Sandals in Mocha Birko-Flor, Euro Size 38 N = (Narrow Width = Fits Narrow to Regular Feet). US Narrow Feet Women Size 7 to 7.5. Cork Footbed (not soft footbed). Faux leather Birko-Flor upper in a casual slide sandal style with an open toe. Smooth lining with a cushioning leather-lined footbed Twin adjustable buckled straps and natural cork footbed.