Harness-2-Booster Car Seats

What Is a Harness-2-Booster Seat?

Two smiling children in the back seat of a vehicle. One is in a booster, and the other is in a car seat with a harness.

Like the name suggests, a harness-2-booster seat converts from a forward-facing car seat with a 5-point harness into a belt-positioning booster seat. Often called combination seats, these forward facing-only seats provide the security of a five-point harness system until your child is ready to ride in high-back booster mode, helping to ensure optimal protection as they grow.  

What Are the Benefits of Harness-2-Booster Seats? 

Harness-2-boosters offer several advantages during the toddler and big-kid stages, including:

  1. Value & Longevity: As a 2-stage seat, harness-2-boosters can cover a significant portion of your child’s car seat journey. With this type of seat, you won’t have to make a new purchase when your child is ready for booster mode.
  2. Easy Transitions: With a harness-2-booster, your child can continue to use a seat that feels comfortable and familiar even when they switch into booster mode, helping to make the transition a little easier.
  3. Room to Grow: When it comes to the harness fit, some harness-2-boosters provide more flexibility for older children than convertible car seats. The Britax Grow With You™ and Grow With You™ ClickTight®, for example, offer higher harness slot heights to help accommodate larger children.
  4. Flexibility for Families: Many families with multiple children will buy a harness-2-booster seat for their older child, allowing them to pass down that child’s convertible seat to a younger sibling. 


When Should I Switch from Harness Mode to Booster Mode? 

Britax strongly recommends that children should remain in a child seat with a 5-point harness until reaching the maximum weight or height allowed. The height and weight limits can be found in your user guide and on the product labels. The Britax Grow With You and Grow With You ClickTight can both accommodate children up to 65 lbs and 49” in harness mode.

You should also check your user manual for any brand- and product-specific guidelines on when to make the switch.

When your child is using the seat in booster mode, the vehicle shoulder belt should lay flat across the center of their chest (not their neck or face), and the lap portion should rest low on their upper thighs (not the stomach).

Information on booster mode usage and child fit for the Britax Grow With You.

Information on booster mode usage and child fit for the Britax Grow With You ClickTight.


How Do I Switch the Seat from Harness Mode to Booster Mode?

Once your child is ready to make the transition, you’ll convert the seat into booster mode by either storing or removing the harness according to the instructions in your user guide. The instructions to convert between modes varies by brand and model. Always follow the manufacturer’s instructions when making the switch.
 
Instructions on switching your Britax Grow With You from harness mode to booster mode.

Instructions on switching your Britax Grow With You ClickTight from harness mode to booster mode.


The Britax Difference

The Britax Grow With You and Grow With You ClickTight harness-2-booster seats are designed for smooth rides and seamless transitions. These combination car seats are thoughtfully designed with features like:

  • Extended Maximum Booster Capacity: Fit children up to 120 lbs and 63” in booster mode, giving your child more room to grow before making the final transition to riding with just the vehicle seat belt.
  • SafeWash® Covers: Safe to machine wash and dry and naturally flame-retardant with no added FR chemicals.
  • Two Cup and Snack Holders with Additional Storage: Keep drinks and snacks within reach for an enjoyable car ride.
  • Trusted Britax Safety: A high-strength steel frame, our patented V-shaped top tether, SafeCell® technology, and two layers of energy management.
  • A 9-Position No-Rethread Harness & Headrest: Adjust together easily with one hand to help you find the perfect fit as your child grows. No rethreading required!
  • Superior Comfort: Soft padding and fabrics help keep your child comfortable on every ride.
  • A 2-Position Recline: Helps you find the most comfortable fit for your child and the correct angle for your vehicle.
  • Color-Coded Belt Guides: Make it easy to route the seat belt correctly & help kids learn how to buckle up safely in booster mode.

Grow With You ClickTight Only:

  • ClickTight Installation: With ClickTight® technology for harness mode installation, you know it’s right in just 3 easy steps: open, buckle and close. The open and accessible seat belt path clears the way for confident installation, and the automatic tensioner takes care of the tightening. 


Additional Resources

At Britax, we aim to make car seat research and shopping easier for caregivers with helpful resources like our Knowledge Center articles and Car Seat Fit Finder. You can also visit our forward-facing and booster seat category page to learn more about our harness-2-booster seats.

 

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