Big Star women's sneakers are made of a combination of textile and eco-leather. Slip-on model with additional lacing. The Memory Foam System remembers the shape of the foot, provides a perfect fit, shock absorbing, deformation resistant and allows moisture evaporation and temperature control. These shoes are extremely lightweight, which makes them even more comfortable to use! When choosing a size, please refer to the size chart.36-23.5/37-24.5/38-25/39-25.5/40-26.5/41-27cm