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, nonslip 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.3623.5/3724/3824.5/3925/4026/4126.5cm