Can I use the seat belt and the lower anchors at the same time?
February 10, 2015
NO you cannot use both. Trust that the car seat manufacturer knows their seat best. Unless they tell you to use both, they don’t want you to use both.
There are a few exceptions.
The most common exception is with booster seats that offer LATCH, where the lower anchors will secure the booster to the vehicle, and then the vehicle’s seat belt goes across the child’s body to secure the child.
For 5-point harness car seats, there are only 2 seats that currently allow you to use the lower anchors AND seat belt.
1. The Clek Foonf (a convertible seat) when used FORWARD-facing uses the rigid lower anchor connectors AND the vehicle’s seat belt (and the tether too) – which effectively negates the entire issue discussed below of the lower anchors having weight limits.
2. The Nuna Pipa infant seat also allows the use of the rigid lower anchor connectors AND the vehicle’s seat belt.