The boot upper is made with 58% recycled materials and 10% bio-based wood fibres. Recycled blend and bio-based faux leather upper. Recycled blend comfortable foam insock. Recycled blend cotton twill lining. Recycled blend TPR outsole. Heel height: 4cm/1.6in. Shaft height: 16cm/6.3in. Calvin Klein logo at the side and pull tab. Runs true to size. Country of origin: Portugal. Colour: black