As Veja reports,

"Upper: C.W.L. (organic cotton coated with a resin from P.U., corn starch and ricinus oil)
Panels: C.W.L. and vegan suede
Logo V: Vegan suede
Insole: Amazonian rubber (11%), sugar cane (42%), recycled E.V.A.* (11%) and organic cotton (12%)
Outsole: Amazonian rubber (40%) and recycled rubber (10%)
Lining: Tech (100% recycled polyester)
Laces: Organic cotton (100%)
Made in Brazil

C.W.L.: Cotton Worked as Leather
This material is a vegan alternative to leather, with a very similar appearance and excellent resistance. A 100% organic cotton canvas, coated with P.U., corn starch, and ricinus oil. 54% bio-based.

*ethylene vinyl acetate"