sole: 35% rubber, 33% rice rubber, 32% amazon wild rubber loops and laces: 100% recycled polyester bio based light sole, made with natural rubber and rice waste: 3.5 cm knitted upper is made with 100% recycled material in soft and breathable knit allows the runner to be extremely light tpu detail gives a stability to the foot the cushion inserts on the heel and on the foot pad provide both energy return and shock absorption making this runner suitable for long distance running flat laces pebax logo v rick owens grosgrain logo tape on the tongue back tab upper: 100% recycled polyester detail: 100% pebax made from castor oil mid sole: 100% eva sole: 35% rubber, 33% rice rubber, 32% amazon wild rubber loops and laces: 100% recycled polyester