NARROW WIDTHThe Birkenstock Women's Arizona Birko-Flor is a genuine classic that has been delighting both men and women for decades. This simple sandal with two straps stands for timeless design and has long held cult status thanks to its comfort factor. The color-coordinated tongue buckles round off the shoe’s look of sophistication. The upper is made from the skin-friendly, hard-wearing synthetic material Birko-Flor .