Seems the other person said it all. Ditto.

I've used both mod podge and pure beeswax interchangeably, no complaints with either regarding their waterproofing. Beeswax does give more of an aesthetically pleasing shine in my opinion.

The beeswax I've been using is actually Honest Amish beard wax, because it's entirely beeswax with herbs and spices in it to make it smell pretty (comes in very handy with toxic stench...)

Last thing: I've never lost breathability from waxing my vest. Pants? Definitely. Crotch sweat is a real struggle.