Top tether anchorage strap is the flexible component designed to restrain the top portion of the child car seat, referred to in consumer literature as the top tether strap. Previously called an upper anchorage strap. A top tether strap prevents the child car seat from rotating forward in the event of a crash and is tested for strength, independent of the ISOFIX low anchorages or vehicle seatbelt.
Top tether anchorage point is the location where the top tether strap on the child car seat is anchored to the vehicle. Also known as an upper anchorage point.