[Jack sets the tracing paper on the floor, motioning for Donnie to step on it so he can trace around his heel and toes, getting as exact a representation of his whole foot as possible.]

That is a worry with many of us. I absolutely ruined my trousers the first time the tails popped out. That's why I offered to do this for others to begin with, really. So even if you damage the tabi with changing feet, so long as you do not tear open the rubber soles, I can probably repair them.