Big Star shoes have an upper made of a material that makes them comfortable to wear. This model is retractable. Sneakers have a material insert. Set on a soft platform with rubber, non-slip sole. In addition, the upper has a rubber insert that adapts to the width of the foot. This shoe is perfect for walks, work or school! When choosing a size, refer to the size chart. 36-23.5/37-24/38-24.5/39-25/40-26/41-26.5cm