Fit Guide: PLEASE GO UP A SIZE, these fit small. Upper in C.W.L, cotton coated with PU and resin from the corn waste industryPanels made out of C.W.L and coated canvasLogo V made of rubber Lining in jersey (33% organic cotton & 67% recycled polyester)Insole made out of wild rubber and other synthetic materialsSole made of wild rubber from the Amazonian forestMade in Brazil, in the region of Porto Alegre.