It's a purely synthetic, acid free leather wax (fat) and an ideal treatment for antique leathers. This fat has a strongly waterproofing action and prevents mildew growth. It is a common treatment for older cabriolets after Leather Protector treatments and with antique and shiny furniture leathers such as Chesterfield leather. It is also a very good treatment for handbags, suitcases, saddles, shoes etc.Another area of use is real pull up leather. This is leather where the surface coloring process has been followed up by a colored wax/fat layer. These leathers show wear marks fairly easily which can be eliminated quickly by the use of Leather Preserver.