I like Pecards, its a great grease.
Dont go too heavy with whatever you use - treat, dont soak.
Man Skidmore's Leather Cream.....memories.
I bought a 1/2 gallon bucket of that stuff early 90s when I got a set of Roper boots while on a MC trip out to Nebraska. It looks to be not only a leather treatment but a possible substitute for peanut butter.
It worked, kept a lot of my leather supple.
I still have the Roper boots 30 years on and still wear them. They get a regular dose of Pecards or Limmer Boot grease these days though.