Thumbs up for the SOL brand rolls from REI. I much prefer durapore tape over duct tape for wrapping wounds, but I keep SOL rolls in FAKs and hiking kits as the what's left tape of choice. Perfect for taping up young Tenderfoots (literally) before their first 'big' Scout hike - "Mr. Lono, why are my feet silver, what's all this tape for??"

I'll have to think a bit on how you can contour an 8x11 sheet of duct tape over size 8 feet - it might make an even more effective cover for young (and old) Scout feet.