The ONLY thing that I EVER use on leather Holsters is Kiwi Shoe Polish once every few years. I would NEVER use Oils, Soaps, Treatments, Softeners, etc. as they will soften the Leather, ruin their retention qualities and shorten their longevity as a useful holster. The shoe polish serves to make the Holster look better once again and add a layer of some sort for some level of protection - but mostly cosmetic. Most importantly it does NOT soften the leather.