The sandal upper is crafted with 100% recycled polyester, excluding trims. The recycled polyester in this product was created by reprocessing existing materials. Recycled polyester upper. Leather lining. Rubber and EVA outsole. Heel height: 4cm/1.6in. Ergonomic footbed with arch support. Calvin Klein all-over logo jacquard upper. Runs true to size. Country of origin: China. Colour: black