The Box tie is a technique used in BDSM play which involves the restraint of a person's arms by binding them behind their back. The arms are bound with the palm of each hand on the forearm of the other hand. A rope goes round the hands and arms, and extra ties go round the upper arms to stop the bound person pulling their arms sideways. This is a relatively non-stringent method of bondage, and most people can endure it for prolonged periods provided the ropes are not so tight as to restrict blood circulation too much.