Colour: blackHeel: no heelFastening: no fasteningSustainability: use of recycled materialsMaterial: outer part - cowhide inner part - cowhide inner part - cowhideinner part 1 - pigskininner part 2 - recycled polyestersole - TPULeather properties: Leather is a natural material of animal origin that has its typical properties, such as scars, pigment spots, abrasions or wrinkles.