I just got a pair of men's Cascadia 9's, since I can no longer get my favorite Montrail Sabino Trail's in my size off the web. Haven't taken them on a trip yet, but I have a slight concern about breathability and drainage. I was considering drilling a few holes at the bottom of the heal cups (beneath the level of my orthotics), for added drainage. Has anyone ever tried this? Does it add anything? Subtract?
