Glad I read this before I got around to making them as gifts. After reading the directions, I washed the baking potatoes, wrapped in 1/2 paper towel, wrapped Warm and Natural batting around it and microwaved until it was done, about 10-15 minutes at 5 minute intervals rotating them.
They turned out fine but I like them better with crispy skins from the oven. That said, I really was going to make some bags for gifts but will hold off for now. The Warm and Natural batting seems to be fine and I just let it air out after use.