Our last video in the series shows a very interesting restraint piece. Our victim is a collector with vast knowledge of institutional restraints. However, he is not sure of the history of this piece. His closest guess is that it is a bath tub restraint system. The neck hole is small to prevent slipping under the water plus access holes. It fits very well on a bed with additional restraints. We used Humane bed restraints which worked quite well. Even though this may not be designed for a bath tub, it is still a hot idea.