I keep a pen with some duct tape wrapped around it in my shaving kit and my wife keeps one in her purse. When one of our scouts or kids starts getting a hot spot ready to turn into a blister, especially when breaking in new shoes or boots or when hiking, we take a small piece of tape and cover the affected area. They are as good as new. The tape provides a friction free area and sticks way better than another tape we have tried.
By David from College Station, TX