From Birkenstock, the Women's Arizona Sandals feature: Birko-Flor® upper - a high-quality synthetic leather with a comfortable felt lined backing adjustable strap with buckle closure for custom fit leather lining contoured footbed molds, cradles and supports your foot raised toe bar grips motion of your feet, exercising your legs and aiding circulation neutral heel profile and deep heel cup keep the natural padding of your foot where it belongs and distributes your body weight more evenly flexible white EVA outsole offers lightweight, shock absorbing support with lasting durability flat heel Imported.Due to wider European styling, narrow sizes will fit more like American medium sizes.