The BIG STAR high sneakers have fine insulation in the form of a warm filling inside the shoe.. The non-slip, firm sole guarantees safety. The shoes have a material upper on the surface. Don't forget to check out our BIG STAR collection! When selecting a size, use the size chart.36-23,5/37-24/38-24,5/39-25,5/40-26/41-26,5 cm.