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Couldn't find the "real" duct tape that actually sticks last year and used that clear red Tuct tape used for vaper barrier in houseing developement. It seems to work much better for taming the hot spots on your feet in the scree.
Mind you I tried liner socks this year and only had to tape my toes toward the end of the trip when the toe nail started wearing through his little buddy next to him. Now that smarts!