BabyDays Get BabyDays
Car seat safety4 minute read

Can my baby wear a coat in a car seat?

Bulky coats can compress in a crash and leave extra room under the harness. Use thin layers and add warmth over the secured straps.

By BabyDays. Updated 12 October 2026. How we write our guides

The short answer

The American Academy of Pediatrics advises against putting bulky coats or snowsuits under a car seat harness. Dress your baby in thinner layers, secure the harness according to the seat instructions, then place a coat or blanket over the straps if needed.

Why bulky clothing can affect the harness

A puffy coat may feel snug when you buckle your baby into the seat. In a crash, however, the padding can compress and leave extra space under the harness. The American Academy of Pediatrics warns that this can increase the risk of injury.

Check the car seat and vehicle manuals for instructions on harness fit and approved accessories. Don’t add an insert or product that didn’t come with the seat unless the manufacturer says it is suitable for that exact model.

Add warmth over the secured straps

The AAP suggests dressing a baby in thinner layers, buckling and tightening the harness, then placing a coat or blanket over the harness straps if extra warmth is needed. Keep the baby’s face uncovered and remove extra layers when the vehicle warms up.

Don’t place bulky clothing or blankets between your baby and the harness. If you’re unsure whether the straps fit correctly, ask a certified child passenger safety technician or a local service qualified to check your seat.

Use the advice for your specific seat

Car seats and safety requirements vary by country. This article summarizes AAP guidance for the United States. Follow the instructions for the seat and vehicle you use, along with local child passenger safety rules.

An article can’t check your baby’s harness in person. If the fit is unclear, get hands on help before travel. For general first trip preparation, see the separate guide to your newborn’s first car ride.

Sources and further reading

Sources checked 12 October 2026. This page doesn’t replace advice from your own doctor.

  • How can I bond with my newborn?

    There is no single moment when every parent feels bonded. Gentle attention, everyday care and time to learn your baby can help a relationship grow.

  • How far can a newborn see?

    A newborn’s distance vision is blurry, and they see best at close range. Looking at a caregiver during a feed is already within that range.

  • Can newborns hear their parents’ voices?

    Talking and singing are easy ways to spend time with your baby. A response to a voice isn’t a substitute for a newborn hearing screen.

Back to all newborn guides