Tether car seat
A top tether is the secondary connection at the upper rear of a forward-facing child restraint. It attaches a strap from the child seat shell to an approved anchor point in the vehicle, reducing how far the seat rotates forward during a crash. Many caregivers first encounter the tether when switching from a rear-facing infant carrier to a forward-facing harnessed seat, and the upper belt path can look unfamiliar. Understanding the tether is practical because it changes how lower anchors, seat belt routing, and harness fit work together during restraint installation.
Essential answer
A tether car seat is a forward-facing child restraint that uses a top tether strap in addition to the lower anchors or vehicle seat belt. The tether runs from the back of the child seat shell to a dedicated anchor point, commonly found on the rear shelf, floor, seatback, or cargo area. Its purpose is not to hold the seat against initial forward movement by itself. Instead, it limits the downward and forward rotation of the restraint when crash forces pull the child and harness forward, which helps keep the child’s head from traveling as far.
The top tether matters most because a forward-facing seat without it can rotate significantly even when the lower connection feels tight. The lower anchors or seat belt locate the base, while the upper strap controls rotation at the top of the shell. This two-point or three-point scheme spreads crash loads more effectively through the seat structure. When used correctly, the top tether strap on a car seat works with the harness fit and lower anchors to keep the child’s body aligned with the protective shell.