Women's eco leather. They are fastened with an adjustable strap with a buckle, which allows for a better fit to the foot. In addition, they are decorated, which gives them a unique character and style. Perfect for summer days and different occasions! When choosing a size, please refer to the size chart.36-23.5/37-24/38-24.5/39-25.5/40-26/41-26.5 cm