Upper : Leather Panels : Leather V : 26% Amazonian rubber 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) Laces : 100% organic cotton