Mesh exterior covering: recycled plastic fibers Nubuck coating: 47% PET 53% polyester Outer covering: 71% polyester / 29% cotton Embroidered side logo Lining: recycled plastic bottles Removable insole: recycled cork covered with recycled polyester Outsole: 40% recycled rubber Laces: 100% recycled PET * 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).