Upper: 100% calfskin leatherInner lining: 100% pig skin leatherSole: 100% syntheticHeel height 4 cm (1.57'')Extra ComfortInsole measures 8.75” heel-to-toe approximatelyBy purchasing this product, you're supporting responsible leather manufacturing through the Leather Working Group.ISO 14006 Ecodesign: We design our collection by identifying environmental impact throughout the product life cycle, with the aim of minimising it.ISO 14001 Environmental management systems: We protect the environment and minimise pollution in all our processes.Through Amfori certified BSCI audits, we monitor the social and environmental sustainability of the entire supply chain.Zero Waste: We place value on raw materials, reducing waste and promoting their re-use.Pikolinos works towards sustainability in all its materials and manufacturing processes.