The boots are made of natural leather. They have a classic binding that allows you to adjust the shoe to the leg width. A thicker sole will perfectly isolate from the cold ground. The insole is made of natural leather. They look beautiful on the leg! You absolutely must have them! When choosing a size, please use the size chart. 36-23,5/37-24/38-24,5/39-25/40-26/41-26,5 cm.