From Birkenstock, the Arizona Oiled Leather Big Buckle Hardware Sandals feature: • Oiled leather upper features a soft, distressed leather that emphasizes a handcrafted and natural look (variations may occur) • Adjustable big buckles • Slide on • Unlined construction • Birkenstock contoured cork footbed supports the arches of the foot and the deep heel cup cradles the foot for all day support • EVA outsole • Flat heel • This style uses an antique oil finish that allows the natural character of the leathers to shine through. This may result in slight color variations from pair to pair.