Why can't my baby wear a thick jacket in the car seat?

Thick or padded jackets compress in a crash, so the harness sits too loosely and the child can be thrown forward (advice from the ADAC, Germany's automobile club). Better to dress thin, fasten the harness snugly and lay a blanket over the fastened harness.

How many layers does my baby need in winter?

Several thin layers using the layering principle: a long-sleeve bodysuit as the base, a boiled-wool or fleece suit on top and, depending on the cold, a winter jacket or snowsuit, plus a hat over the ears and a warm footmuff in the stroller.

Is it bad if my baby's hands are cold?

Cool hands and feet are normal in babies and not a reliable sign. Check the back of the neck or the upper back instead: warm and dry means the clothing is right.

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Dressing your baby in winter

In winter the magic word is layering: several thin layers instead of one thick one. Warming pockets of air form between the layers, and you can add or remove clothing flexibly – for instance when you come in from a cold walk into a warm supermarket.

In short: long-sleeve bodysuit as the base, then boiled wool or fleece, then (depending on the cold) a jacket or snowsuit. Hat over the ears, footmuff in the stroller – and in the car no thick jacket under the harness.

Chart: winter clothing by temperature

Temperature	Recommendation
8–12 °C cold	Long-sleeve bodysuit · boiled-wool/fleece suit · jacket · hat over the ears · mittens · footmuff in the stroller
3–7 °C very cold	Long-sleeve bodysuit + sleepsuit/boiled wool · winter jacket or snowsuit · warm hat · mittens · warm footmuff
below 3 °C frost	Warm winter all-in-one · thick hat over the ears · neck scarf (no loose scarf) · thick mittens · sheepskin footmuff

Safety in the car seat (important!)

⚠️ No thick or padded jacket and no snowsuit in the car seat. In a crash the padding is compressed and the harness then sits too loosely. Better: dress thin, fasten the harness snugly and lay a blanket over the fastened harness (recommendation of the ADAC, Germany's automobile club).

Frost: keep it short & check

In sub-zero temperatures keep time outdoors short and check cheeks and neck regularly. Skin with cream on it freezes faster – in frost, use a special cold-protection cream rather than a water-based one. Once indoors, quickly remove a layer so your baby doesn't get too warm.

🧮 Open the clothing calculator

Frequently asked questions

Why no thick jacket in the car seat?

It compresses in a crash and the harness sits too loosely (ADAC). Dress thin, harness snug, blanket over the harness.

How many layers in winter?

Several thin ones: long-sleeve bodysuit, boiled wool/fleece, then jacket/snowsuit, hat, footmuff.

Are cold hands a problem?

No, they're normal in babies. What counts is a warm, dry neck.

By Felix & Merle · parents of Josefine

We built HeyFini out of our own everyday life with a baby. Our recommendations are based on recognised sources (among them the Lullaby Trust for safe sleep and the ADAC, Germany's automobile club, for car-seat safety) and our own experience as parents – more in our story. Last updated: June 2026.

More dressing guides

General guidance, not medical advice. When in doubt, ask your paediatrician or midwife.