Arizona Soft Footbed Birko-Flor in Color Blue | BIRKENSTOCK US。The Arizona slipper is a classic model, one of the most popular of Birkenstock. Arizona is adjustable with two straps and is designed to adapt to different shapes of the sole of the foot. The upper is made of Birko Flor, an extremely pleasant and durable material. The anatomical insole is made of cork and latex and has a shape that welcomes the foot very well. The insole is in suede. The peculiarity of this model is the soft footbed. The Soft Footbed has a latex foam cushion integrated into the footbed, which gives unmistakable comfort from day one. Arizona stands out for all the quality of Made in Germany products.