I’m in the same boat as you. I really like a light and flexible boot for training, hiking and backpacking. A couple of years back I wore something like the Hoka TOR Ultra. It’s a great boot but of course they have stopped making it, for now. After those I went with the same Altras you mentioned...
I just used NikWax on my Vasque’s. Sheds water well. It did darken the sued a little. I would have been fine if it would have made it even darker though.
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