Size 6/37 Upper: C.W.L. (organic cotton coated with a resin from P.U., corn starch and ricinus oil) Panels: C.W.L. Logo V: Amazonian rubber (26%) Insole: Amazonian rubber (11%), sugar cane (42%), recycled E.V.A.* (11%), organic cotton (12%) and others (14%) Sole: Amazonian rubber (40%), silica (23%), recycled rubber (10%), synthetic rubber (11%), and others (16%) 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.