Fiebing's golden mink oil leather conditioning paste was compounded especially as a preservative for boots, shoes & other leather goods subjected to rugged outdoor use.
Seriously puts such a nice finish on leather & adds a water repellent element to both tooled & smooth leather. I like to apply it simply with my fingers. (Seems like it's good for your hands too, but that is strictly my opinion & not in any way endorsed by Fiebing's)