Sorry to dig this up but had to comment. I have worked in the bush for the past 20 years and have tried most everything out there, the biggest problem to balance is waterproofing <> leathers ability to breathe. Usually there is a tradeoff. I found birch tar oil a few years ago and wish I would have known about it 20 years ago. It gives the same waterproofing as a wax but lets the leather breathe, never have sweaty feet problems using it. It also makes the leather quite resistant to molds, fungus, bacteria which is a nice bonus as I have a habit of forgetting my boots for during spring breakup in my dry bag! Has an awesome smoky smell to boot!
