The great bags were made of natural suede leather. A sturdy outsole with a wide heel ensures stability at every step. The insole is insulated with a leather element. Zipper up. Inside they are insulated with a shoe blanket. When choosing a size, please refer to the size chart. 36-23,5/37-24,5/38-25/39-25,5/40-26,5/41-27 cm.