The trainer upper is crafted with 100% recycled polyester, excluding trims. The recycled polyester in this product was created by reprocessing existing materials. Recycled polyester comfort knit upper. Comfortable foam insock. Recycled blend polyester mesh lining. EVA outsole. Heel height: 4.6cm/1.8in. Calvin Klein tonal logo on elasticated strap. Runs true to size. Country of origin: China. Colour: white