Nappa leather is leather obtained from the skins of various animals. It is processed on the grain side (aniline leather, semi-aniline leather, covered leather) and is a soft, chrome-tanned, full-grain smooth leather.
Aniline leather is leather dyed with tar dyes (aniline dyes). With semi-aniline leather, the leather only receives a light colour layer (pigmentation). It is important that the natural grain pattern is not concealed by the colouring, but only slightly protected.
Covered smooth leather is surface-pigmented smooth leather with a water-repellent colour and protective layer on the surface.