Coating outside : 26% grape marc, 54% polyester recycled, 20% water-based PU Lining and inner sole: 100% microfibers from the circular economy Outsole: neolite 2.5 cm flat heel Elastic side for easy donning * 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).