If you are between sizes, we recommend you choose a size above your usual one. Upper:Alveomesh (100% recycled polyester) Panels:Suede and leather Logo V:Amazonian rubber (26%), mineral silica (22%), synthetic rubber (14%) and others (38%) Insole:Amazonian rubber (10%), bio-based E.V.A.* (41% sugar cane), recycled E.V.A.* (10%), organic cotton (16%) and others (13%) Midsole:Bio-based E.V.A.* (52% sugar cane) and others (35%) Outsole:Amazonian rubber (12%), mineral silica (30%), synthetic rubber (49%) and others (9%) Lining:Tech (100% recycled polyester) Laces:Organic cotton (100%) Made in Brazil The Alveomesh is a technical fabric made out exclusively of recycled polyester. It brings breathability, flexibility, and lightness to the shoe. *Ethylene vinyl acetate