Upper: ChromeFree leather Panels: ChromeFree leather V: ChromeFree leather Insole: 11% Amazonian rubber, 42% sugar cane, 11% recycled E.V.A. & 12% organic cotton Welt: Rubber Sole: 40% Amazonian rubber & 10% recycled rubber Lining: Tech (100% recycled polyester) Straps: ChromeFree leather