I look at it like this; your average foot sweats a cup a day. No amount of foot powder will absorb that much sweat. It will soak up what it can, and the rest will still be a problem. Not only that, it adds more small friction spots to rub the skin off your foot like fine grit sandpaper. If moisture is the problem, the solution is to have a place for that moisture to go. Wearing waterproof boots outside an extremely cold environment is a bad idea. It doesn’t give the sweat a place to go, and when it does finally dry, it leaves behind tiny salt crystals that build up and will break down your socks, skin, and boots. Having a canvas/mesh/breathable boot will let your sweat evaporate through the material, and you can rinse out the salt from your sweat. If it’s a fungus problem, coconut oil. Oil your feet. Oil your feet daily. It feels gross, but it kills microbes, fungus, and other assorted nasties on your feet. It also acts as a lubricant between your feet and socks and boots. It’s worked for me, and my feet smell like Hawaii instead of rancid meat. Pena Colada anyone?