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 webbing upper. EVA insock. EVA outsole. Heel height: 3.7cm/1.5in. Adjustable velcro ankle strap. Calvin Klein tonal logo on the ankle strap. Runs true to size. Country of origin: China. Colour: white