The Birkenstock Santa Ana is a casual women's nubuck ballet flat with elastic straps for a comfortable fit. These Birkenstock Santa Ana Black Nubuck Women's Shoes have the following features: The upper is made from high-quality nubuck leather that boasts a natural, rustic appearance Ballet flat that boasts a high degree of stability Elastic straps across the instep Anatomically shaped cork-latex footbed Footbed lining: suede Sole: EVA Made in Germany