Outer covering: 72% polyurethane / 22% polyester / 6% cotton Satin exterior coating: 100% polyester Interior coating: 100% recycled PET Removable insole: recycled cork covered with recycled polyester Outsole: 40% recycled rubber Laces: 100% recycled PET Embroidered side logo * All our models are vegan, labeled PETA APPROVED VEGAN and certified OEKO TEX 100 (materials guaranteed to be free of toxic products for the body and the environment).