It is great stuff!
It also rejuvenates old dried out leather, My neighbor, bought a used dirt bike with it he also got a pair of leather motorcycle boots that were very stiff and hard, we warmed them up with a hair drier and applied the rendered bear fat. The boots were brought back to as new condition, and he is still using them 4 years later. They are still comfortable and waterproof, according to him.
I have been using bear fat for umpteen ?? years, my leather boots are still water proof and very comfortable.