Upper : Leather Panels : Leather V : 26% Amazonian Rubber & 22% rice waste Insole : 11% Amazonian rubber, 42% sugar cane, 11% recycled E.V.A. & 12% organic cotton Sole : 31% Amazonian rubber, 22% rice waste & 12% recycled rubber Lining : Tech (100% recycled polyester) Laces : 100% organic cotton