I've looked far and wide for a leather conditioner that restores moisture and strength to worn and dried leather wallets, belts, boots, etc. Chamberlains Leather Milk has been the best I've found, by far. There are many options out there, many of which are made overseas or in facilities that manufacture a wide range of chemicals. Well Chamberlains is made in a dedicated facility in Forth Worth, TX, and makes water-based conditioners and salves that contain natural oils, and in their words, mystical properties.
I've tried some other brands like Leather Honey, Blackrock, and Lexol. They did a decent job, but they just didn't deliver the same results I've been able to achieve with Chamberlains Leather Milk.
My go to product from Chamberlain's is their Leather Care Liniment No. 1. It's great for rehydrating leather goods of all kinds. I've found it restores flexibility, removes scratches and scrapes, and brings back a rich color to dried and neglected leathers. I recommend picking up a bottle of Liniment No. 1 for your boots, bags, wallets, belts, and sheaths!