The Alveomesh is a technical fabric made out exclusively of recycled polyester. It brings breathability, flexibility, and lightness to the shoe. 100% recycled polyester. *ethylene vinyl acetate Details: Upper : Alveomesh (100% recycled polyester) Panels : Suede and leather Logo V : Amazonian rubber (26%) Insole : Amazonian rubber (10%), sugar cane (41%), recycled E.V.A.* (10%), organic cotton (16%) and others (13%) Outsole : Synthetic rubber (49%), mineral silica (30%), Amazonian rubber (12%) and others (9%) Midsole : E.V.A made from 52% sugar cane and 35% others Lining : Tech (100% recycled polyester) Laces : Organic cotton (100%) Made in Brazil