They Are designed to prevent drivers and passengers from being completely ejected from a vehicle by spreading out their bodies’ energy over their shoulders, chest, and pelvis in a collision. Attached with a lap and shoulder belt, with a tether attached. Attached to lower anchorages of child restraint anchorage Organisation, http://www.drugoffice.gov.hk/gb/unigb/www.ledteks.com/seatbelt-and-safety-belt-webbing