From Birkenstock, the Women's Madrid Oiled Leather Big Buckle Hardware Slide Sandals feature: Oiled leather upper features a soft, distressed leather that emphasizes a handcrafted and natural look (variations may occur) Slip on design Oversized buckle detail for an adjustable fit Unlined Birkenstock's contoured cork footbed supports the arches of the feet 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.