Although you say they are specifically designed for use on feet I would be surprised if they stood up well to the sort of battering they'd get over the course of a day's trail hiking. Compared to the amount and type of walking the average American does in a day, a long day's hike with plenty of elevation gain and loss is like comparing freeway driving to the Baja 500.

I would test them out by hiking with one on my foot without a blister to protect, then see how long it lasts before it falls off or gets shredded. I'd be surprised if one lasted even half a day of that kind of rough treatment. But new and surprising things do happen with modern technology, so let us know how it turns out.