The classic Birkenstock Arizona in silver Birko-Flor upper. This high quality synthetic material is exceptionally durable and easy to clean. The original Birkenstock cork-latex footbed supports your feet with its anatomical design, moulding to the shape of your feet over time for one of a kind comfort. Features Birko-Flor synthetic uppers Suede footbed lining Anatomically correct cork footbed for support Moulds to your feet over time Shock-absorbing EVA outsoles Fitting Notes The Arizona Birko-Flor has two adjustable straps, so you can buckle each strap to securely hold your foot in. The Birko-Flor upper material is soft and won't take as long as leather to wear in so they should be comfortable within a day or two of gradual wear. Most people will wear the regular width in the Arizona unless they have an especially narrow foot. If your foot is average to broad in width, it's much comfier to have more room to spread out your toes and tighten the straps rather than opting for a narrow fit. You can also have extra holes punched in the straps if they are too loose.