Upper : ChromeFree leather Panels : ChromeFree leather V : 26% Amazonian rubber & 22% rice waste Insole : 11% Amazonian rubber, 42% sugar cane, 11% recycled EVA & 12% organic cotton Welt : 22% rice waste Sole : 40% Amazonian rubber, 26% rice waste & 10% recycled rubber Lining : Tech (100% recycled polyester) Laces : 100% organic cotton