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    Best Harnessed-Booster Car Seats

    These seats are designed for kids who have outgrown their rear-facing seat

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    Dad is adjusting the kids' harness in a toddler booster seat. Photo: Consumer Reports

    Consumer Reports’ harnessed-booster car seat ratings have been updated with our latest test findings, revealing the seats that provide the best balance of crash protection, ease of use, fit to vehicle, and booster belt fit. (Seats are evaluated for their crash protection on a scale of Basic, Better, and Best.)

    You’ll find five of our top models below.

    Also known as harness-to-booster seats or forward-facing-only combination seats, harnessed-booster car seats are typically used for kids who have outgrown the height or weight limit of their rear-facing seat. Harnessed-booster seats are used until children are big enough to use the vehicle belts alone.

    More on Car Seats

    These car seats are initially used with a five-point harness system to restrain the child; then, after they outgrow the harness, they transition to using the seat in booster mode with the vehicle’s seat belts to restrain them without having to purchase a separate booster seat.

    CR’s experts recommend delaying the move to a harnessed-booster combination car seat as long as possible because there is a loss of relative protection from rear-facing to forward-facing and from five-point harness to booster. See our car seat buying guide for more information.

    Especially when it comes to booster seats, experts say that it’s not just a matter of your child’s weight or height.

    “For booster seats, the child needs to be able to sit upright with the belt properly positioned the entire ride—no squirming or moving around,” says Ben Hoffman, MD, president of the American Academy of Pediatrics’ (AAP) Council on Injury, Violence, and Poison Prevention and the author of the AAP policy on child passenger safety.

    Before putting your child in a booster, first check to make sure your child can get the proper seat belt fit with the booster. Your child should also be mature enough to stay put because the seat belts are not locked in place, as they are with a harness.

    Boosters are meant to elevate children so that the vehicle’s seat belt fits them properly, with the shoulder belt resting midway across their collarbone and chest, and the lap belt sitting across the upper thighs and hip bones. This ensures that the forces applied by the seat belt in the event of a crash will be to the strong, bony parts of a child’s body and that the child stays properly secured by the seat belt.

    How CR Tests Car Seats

    Our fit-to-vehicle scores take into account how long parents can use the car’s built-in lower anchors (or LATCH) to install the seat vs. using the seat belt and are rated for both installation methods.

    We also evaluate how the belt fits a child when these models are used as a booster seat. We evaluate this in actual vehicles—the same ones we use for our fit-to-vehicle assessments for all car seats—and we use a child-sized dummy that represents an average 6-year-old. We evaluate belt fit both after the initial positioning of the dummy in the booster and again after we simulate typical child movement.

    Our crash-test protocol goes a step further than federal government requirements for car seat tests by using an actual vehicle seat that sits behind a simulated seatback, and our test has higher crash energy and speed to be more representative of current vehicles and crashes.

    Consumer Reports tested 11 of these car seats, rating them on crash protection, how easy they are to use, and how well they install in a variety of vehicles, as well as their ability to achieve and maintain proper seat belt fit as a booster. The results show clear performance differences among the seats tested. The models below excelled in our tests. Our complete car seat ratings are available free of charge.

    How to Install a Car Seat

    Child seats have come a long way over the years, but proper installation is key. On the “Consumer 101” TV show, Consumer Reports expert Jennifer Stockburger shows host Jack Rico what to do to keep little ones safe in a car.


    Emily A. Thomas, PhD

    Emily A. Thomas is the associate director of auto safety at the Consumer Reports Auto Test Center, leading the child car seat and rear-seat safety programs. She joined CR in 2015 after earning her doctorate in pediatric injury biomechanics from Drexel University and Children’s Hospital of Philadelphia, focusing on the biomechanical differences between kids and adults in far-side low-speed crashes. Involved in automotive safety since 2008, Emily has been a certified child passenger safety technician (CPST) since 2015.