The Birkenstock Women's Sonora Crosstown Leather Sandals are perfect for those that are on their feet throughout the day and want shoes that provide exceptional comfort. The polyurethane sole is foamed onto the footbed in two layers, which results in excellent non-slip properties, great flexibility and a long life, while the upper is made of especially thick, oiled Nubuck leather with unfinished edges. Additionally, the Sonora sandals feature a cork-latex footbed, a signature of all Birkenstock shoes.