The trainer upper is crafted from 100% recycled polyester, excluding trims. The recycled polyester in this product was created by reprocessing existing materials. Recycled polyester upper. Recycled blend comfortable foam insock. Recycled polyester mesh lining. TPR outsole. Heel height: 4.5cm/1.8in. Coated trim. Hybrid hiking boot/trainer styling. Calvin Klein logo at the side, heel and pull tab. Runs true to size. Country of origin: China. Colour: multicolour