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New parents want to keep their baby comfy, snuggly and warm. As the weather gets cooler, you may wonder how many blankets to use, if a baby can overheat and other common concerns. These guidelines will help answer some of your questions.

Babies lose heat much faster than older children and adults.

  • They have less fat to keep the heat in.
  • They have a much larger skin surface area compared to their weight to lose heat from. (13 percent compared to 3 percent for adults.)
  • They don’t shiver, which produces heat. Similarly, babies can overheat quickly which can be dangerous as well.  

So what should you do? As a general rule of thumb, infants should wear one more layer than adults in colder weather. Your baby will need several layers of clothing to keep warm. It's generally best to dress your baby in an undershirt and diaper, covered by pajamas or a dressing gown, and then a wearable blanket sleeper or sleep sack. Avoid loose blankets as these pose a risk for SIDS (Sudden Infant Death Syndrome).

Choose layers when dressing your baby. Dressing newborns in layers is a great way to make sure that they are warm and comfortable. Layers can be easily added or removed depending on the temperature and your baby's comfort level. When outside, don't forget hats, mittens and socks or booties. Babies lose a lot of heat through their head.

If your baby is premature he or she may need still another layer of clothing until his or her weight reaches that of a full-term baby and his or her body is better able to adjust to changes in temperature. 

Certain clothing features can make dressing much easier. Look for garments that: 

  • Snap or zip all the way down the front, instead of the back.
  • Snap or zip down both legs to make diaper changes easier.
  • Have loose-fitting sleeves so your hand fits underneath to push the baby's arm through.
  • Have no ribbons or strings to knot up, unravel, or wrap around the neck that could cause choking.
  • Are made of stretchy fabric. Avoid tight bindings around arms, legs or neck.

 

Winter Car Seat Safety

Heavy winter clothing can be dangerous with car seats. As a general rule, bulky clothing, including winter coats and snowsuits, should not be worn underneath the harness of a car seat. In a car crash, fluffy padding immediately flattens out from the force, leaving extra space under the harness. A child can then slip through the straps and be thrown from the seat. Use a coat or blanket over the straps to keep your baby warm and safe.  

 

Overheating   

Overheating can easily occur in infants and places your baby at increased risk for hyperthermia and SIDS. Be careful about over bundling your baby, especially when you come inside from the cold. For example, into a heated car or store. When you come inside, remove your baby’s hat and open or remove their coat or outer layer. Even if your baby is sleeping. Keep your baby’s room at a comfortable temperature (not too warm) and check their neck to see if your baby is sweating.  

 

Swaddling  

Many parents wish to swaddle their baby since it can be soothing and provide a sense of comfort and security. Swaddling, however, is controversial and is not recommended by many infant health authorities due to its association with SIDS and hip dysplasia. If you choose to swaddle your baby, use a sleepsack swaddler rather than a loose blanket. Also swaddle only the arms and keep the hips and legs loose.  

See the following articles from the American Academy of Pediatrics (AAP) for information on related topics:

Call (866) MY-LI-DOC (866-695-4362) to find a Catholic Health physician near you.

View additional helpful articles

Pediatric Care

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