Upper: C.W.L. ; (organic cotton coated with a resin from P.U., corn starch & ricinus oil) Panels: C.W.L. ; V: 26% Amazonian rubber Insole: 11% Amazonian rubber, 42% sugar cane, 11% recycled E.V.A. ; & 12% organic cotton Sole: 40% Amazonian rubber & 10% recycled rubber Lining: Tech (100% recycled polyester) Laces: 100% organic cotton;