This is one of our finest handmade slipper series. 90% are hand-sewn with the upper part sewn very tightly by hand to connect the lower part by hand only while the remaining 10% It is made by sewing on a machine. The upper part is made of pure cow leather while the lower part is made of PU material. That is popularly known as PU soles, are made from a new kind of organic polymer material. It has been hailed as the fifth big plastic, and is in the process of revolutionizing the shoe industry.