Booster car seats are used when your child has outgrown their car seat with a 5-point harness and when they are at least 40 lbs. Booster seats are designed to provide your child with a proper seat belt fit when travelling in a vehicle. Features like shoulder and lap belt guides allow your child’s seatbelt to centre on their collarbone and lay flat across their hips/upper thighs. Shop high back booster seats and backless booster seats in Canada with free shipping over $49*! Visit our Learning Centre to read if your child is ready for a booster seat.