Method for making a thermally and electrically conductive coating on natural or synthetic leather comprising the deposition of several layers based on aliphatic polyurethanes, with an intermediate layer, having a thickness from 10 to 50 μm, comprising graphene nano-platelets, wherein at least 90% has a lateral dimension (x, y) from 50 to 50000 μm and a thickness (z) from 0.34 to 50 nm, and wherein the C/O ratio is ≥100:1.