Perfect, winter children's shoes from the Big Star collection. The upper of the ankle is made of synthetic material. In addition, this shoe has a Memory Foam System insole that remembers the shape of the foot, which ensures a perfect fit, absorbs shocks and is resistant to deformation. The structure of the foam allows moisture evaporation and temperature control. The boots also have a slightly reinforced heel. The rubber sole is non-slip. When selecting a size, use the size chart.28-18/29-18,5/30-19,5/31-20/32-21/33-21,5/34-22,5/35-23 cm.