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    Why You Should Never Dress Your Child in a Bulky Winter Coat for Car Rides

    Tips for keeping your little one warm and safe

    Child in winter coat sitting in a car
    CR's experts say it's much safer for children to wear their winter coat backward and on top of their car seat harness.
    Photo: John Powers/Consumer Reports

    “You better bundle that baby up or she’s going to catch a cold!” I knew before I turned around what was happening: The well-meaning lady in the grocery store parking lot wanted to know why my child didn’t have a coat on in her car seat, even though it was the middle of winter.

    The reason? Because a bulky coat and a child car seat can be a dangerous combination. As a general rule, winter coats should not be worn underneath a car seat harness because that can leave the harness too loose to be effective in a crash. 

    More on Car Seats

    “If the child’s coat is too bulky or puffy under their harness, that material can compress during a crash and create slack between the child and their harness,” says Emily A. Thomas, PhD, auto safety manager at the Consumer Reports Auto Test Center. “This extra slack could allow the child to move outside of the protection of the car seat shell. Any time a child is not properly and snugly harnessed within their car seat, there is an increased injury risk.”

    How to Tell Whether Your Child’s Coat Is Too Bulky for Their Car Seat

    The padding in your child’s winter puffer is not a benefit in a crash. In fact, the bulk of their winter coat can create too much wiggle room between their chest and the car seat’s harness. If your child’s coat interferes with your ability to get a snug harness fit against your child’s body, that coat is too big for your child to wear while riding in the car seat.

    “You shouldn’t be able to pinch any harness between your fingers at your child’s shoulders,” Thomas says. “Even with my kids, I have to make sure that their clothing isn’t bunching up under the harness and creating gaps between them and the harness straps.”

    CR spoke with NPR’s ‘Morning Edition’ about the dangers of winter coats and car seats.

    Here’s how to test whether your child’s coat is too bulky for their car seat:

    Step 1: Put the coat on your child, sit them in the car seat, and fasten the harness. Tighten the harness until you can no longer pinch any of the webbing with your thumb and forefinger.

    Step 2: Without loosening the harness at all, unclasp it and remove your child from the car seat. Take your child’s coat off, put your child back in the car seat, and buckle the harness straps, which should be adjusted just as they were when the child was wearing the coat.

    If you can pinch the webbing between your thumb and forefinger now, the coat is too bulky to be worn under the harness, Thomas says.

    Watch this step-by-step guide to checking your child’s car seat harness:

    Safe Alternatives for Keeping Kids Warm in Their Car Seats

    Here are some mom-tested and safety-approved tips from the experts at CR’s Auto Test Center for keeping your children safe in their car seats while keeping them warm all winter long.

    For Babies

    Keeping babies warm in the winter takes a little extra effort, from the tiny gloves and hats to blankets and layers. You can tuck a blanket around your child in their car seat, or purchase the cover, fitted blanket, or canopy designed and tested by your car seat manufacturer for your specific model. Some car seats come with a cover: For example, the Graco SnugRide SnugFit 35 Elite car seat comes with an all-weather boot designed for use with that car seat.

    If you are looking to purchase an additional cover, the fitted covers approved by the car seat manufacturer for your specific model are the safest way to add a warm layer. “These covers have been tested with the seat and won’t compromise your child’s safety,” Thomas says.

    Warm pajamas have been an easy go-to for my babies over the years, especially the type with convertible footies that can be folded over. Just make sure there’s no bunched-up fabric that might prevent the buckle from fastening correctly.

    For Toddlers and Older Children

    The backward coat trick is a classic parenting hack: “After securing them in the car seat, turn the coat around and put it on backward (with arms through the armholes), so the back of the coat serves as a blanket resting on top of the harness,” Thomas says.

    You can also encourage kids to dress in layers, such as a “base” layer with cold-proof gear, followed by a T-shirt and sweatshirt. Or look for fleece zip-up jackets that offer warmth without bulk, like this one my kids have loved for years.


    Alexandra Frost

    Alexandra Frost is a journalist and content marketing writer. Her work has appeared in such publications as HuffPost, The Washington Post, Glamour, Forbes, Parents, Women's Health, Reader's Digest, Popular Science, and Today's Parent.

    Emily A. Thomas, PhD

    Emily A. Thomas is the auto safety manager 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.