Try adjusting and buckling the harness before using. Some have retractable harnesses which remain snug as your baby grows. Car Booster Seat Used only for children over 40 pounds. Travel Tips Always wear a seat belt yourself. Never hold the baby while the car is moving.
Exhaust fumes are dangerous.
Do not travel with hatch open. Do not substitute any other kind of carrier for a government-approved car seat. Babies can get burned on a hot car interior or vinyl car seat. Avoid skin contact and cover car seat with fabric. As the child gets older, watch for potential projectiles such as pencils, groceries, or toys located within reach.