No, the knots weren't on the bottom. It was the thread, but they used that invisithread so that could have made the difference. It is more coarse than regular thread. HTH and good luck at your craft show.
Originally Posted by mytwogirls
Thanks for sharing that information. Can you tell me if the knot of the thread is on the part that touches your foot? I was wondering if that was what was irritating your foot or the thread in general. If it is the knot, then I could make sure that my knots are on the top of the flip flop instead of the underside. I want to make some for a craft show this weekend, but want to make sure that they are durable.