Upper material: Alveomesh (100% recycled polyester) Panels: suede and leather V Logo: rubber and rice waste (22%) Insole: Amazon rubber, sugar cane, recycled E.V.A.* and organic cotton Midsole: sugar cane (52 %)Outsole: Amazonian rubber (12%) and rice waste (30%)Lining: Tech (100% recycled polyester)Lacing: organic cotton (100%)Made in BrazilAlveomesh is a technical fabric made exclusively from recycled polyester . This provides breathability, flexibility and lightness to the shoe. The suede is made from the lower part of previously brushed cowhide to make it softer and more flexible. It comes from farms in southern Brazil (Rio Grande do Sul). It is tanned in Brazil, respecting REACH regulations. Special attention is paid to the use of water during the tanning process. The suede is also coated with PFC-free (chemical compounds) water-repellent oils to protect the shoes from light rain.-Synthetic