Amazon.com: Birkenstock Unisex Arizona EVA Sandals Khaki 42 。Birkenstock is a heritage German footwear brand globally recognized for its orthopedic-grade contoured footbed. The iconic design features a resilient cork-latex core and adjustable straps, delivering a personalized fit and all-day comfort for everyday wear. Core Features & Construction The Footbed: The signature anatomically shaped footbed is made of natural cork and latex, layered with jute for moisture control and durability, and topped with soft suede. It molds to the unique shape of your feet over time. Support System: Designed for weight distribution and improved posture, it includes a deep heel cup, pronounced arch support, and a roomy toe box that promotes natural foot movement.