From Birkenstock, the Arizona Birko-Flor Slide Sandals feature: Upper is made from the skin-friendly, hard-wearing synthetic material Birko-Flor® Slip on design Double adjustable buckles for a custom fit Suede footbed lining Contoured cork-latex footbed supports the arches of the foot and cradles the heel for all day comfort. EVA outsole Imported. Styling Notes: Birkenstock footwear is made in European whole sizes. The style selected is a Birkenstock narrow footbed that will fit most medium feet.