Grow With You Harness-2-Booster grows with your child from toddler to big kid.

2 layers of Side Impact Protection include an energy-absorbing shell, foam-lined headrest, and external cushions that surround the head, neck & torso.

SafeCells in the car seat base create a crumple zone that absorbs crash energy.

Quickly adjust the 9-position harness & headrest using just one hand for the proper fit as your child grows.

Once your child is ready to use the seat belt, the 5-point harness tucks away, transitioning to a belt-positioning booster. Color-coded guides help you and your child route the belt through the right paths.

With easy-to-clean arm rests, cup holders, and snack storage, even big kids enjoy the ride.

  • Harness mode 25lbs - 65 lbs (11 to 30 kg ); Booster mode 40 lbs -120 lbs. (18 to 55 kg ).
  • SafeCells in the car seat base create a crumple zone that absorbs crash energy to help keep it away from your child.
  • Industrial Strength Steel frame reinforces the seat structure to help keep it stabilized.
  • V-shaped tether with staged-release stitches helps slow and reduce forward movement during a crash.
  • 2 Layers of Side Impact Protection: Energy-absorbing shell and foam-lined headrest protect the head, neck, and torso.


  • Expanded assortment available online. This product is not available in our stores.

    Car Seats and Travel Systems are FINAL SALE, no refund or exchange on this item.
    Britax Child Safety

    Britax® Grow with You Harness-2-Booster, Dusk

    SKN: 484951

    Britax® Grow with You Harness-2-Booster, Dusk
    102 out of 113 (90%) reviewers recommend this product
    and for this product
    Website Price: $230.98
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    Delivery postal code: L4K 5R5
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