Bondage belt
From wipipedia.org

A bondage belt is a wide belt designed to go around someone's waist with D-rings attached along the belt to be used as attachments points for ropes, chains, or other bondage devices. Used correctly, they can be very effective in a wide variety of bondage techniques. The width of the leather makes it much more effective than rope in reducing the chance of the bondage cutting into the flesh.
A bondage belt should not be used for suspension bondage, as there is a risk that it might slide up the body, pressing on the rib-cage and diaphragm, thus restricting the person's ability to breathe.