I keep bees and I'm a cheap bastage so I've always just melted some beeswax in a double boiler and added a little olive oil to it to keep it from stiffening up a little and used that on warmed boots,knife sheaths,holsters etc. It seems to keep the leather in good shape and lasts pretty good.
I use the same stuff on patches for my muzzle loader too and it'll take the place of chap stick in a pinch.
I am by no means an expert on leather care and I live in Arkansas so my boots don't get beaten by the extremes that some of y'all who live in my dream hunting areas do.
