From site: Minimalist-friendly design, maximum comfort. The Uji sandal's suede upper comes together softly over the foot, secured by nubuck hook-and-loop straps for the perfect fit. With an original contoured footbed for support, it'll feel uniquely yours wherever you take it. Contoured cork-latex footbed creates custom support with wear Suede upper with two nubuck leather hook-and-loop straps Suede footbed lining Flexible EVA sole Made in Germany Width is stated as medium/narrow Size 41 is a 10-10.5 according to Birkenstock website Excellent condition worn once (I need a 42)