The Tanuki models are designed to be both air and water permeable. And we enjoy the feeling of going without water repellent coatings! (Which don’t make a difference with this particular material anyway...)
2.Wildlings with a woolen upper material
Wildlings whose upper material is or contains wool should not be completely impregnated – only their microfiber edging.
Wool has water repellent properties by nature – additional waterproofing will damage the structure of the wool. If the natural protection starts to diminish after some time and the shoe feels clammy from inside, you can re-grease the shoe.
You can find out how to do that right here.
3. Waxed models
With waxed models, too, the upper material should be spared during the waterproofing process and the treatment should be limited only to the microfiber edging and recesses in the sole.