The sandal upper is crafted with 87% recycled polyester, created by reprocessing existing materials. Recycled blend neoprene upper. EVA insock. Recycled polyester stretch lining. EVA outsole. Heel height: 2.3cm/0.9in. Webbing trim. Adjustable velcro strap. Comfortable contoured footbed. Calvin Klein logo on the straps and heel. Runs true to size. Country of origin: China. Colour: black