From Ryka, the Women's Clever Knit Ballet Flats feature: Breathable engineered knit upper Padded collar Fabric lining for comfort Easy slip-on fit Supportive die cut EVA insole Lightweight molded TPR midsole Lightweight molded TPR outsole for flexibility and support Machine wash on cold and air dry Approx. 0.50" heel height Weight: 162g/5.7oz per shoe Heel-to-toe drop: 6mm Imported.