I use the wheels for horse training. The bright colors are very good to see both on grass as well as in the sand. I sit thus marks. It simplifies the training, because it for the horse and rider "sense" does at certain points avert or to ride along. They are excellent as a guide. Even if things do not go skin, a horse's hoof keeps the window stood. They deform, but are easy to press in the original shape without going broke.
