Baby sleeping bag: What should you dress your baby in underneath?

A Sleeping Bag is not only an essential part of your baby’s initial essentials, but also one of the best choices to help your baby sleep well and safely at night, because:

    • the temperature in the Sleeping Bag can be regulated optimally,
    • combined with suitable Clothing Line, children will neither sweat nor freeze in it.

However, many parents are often unsure what to dress their child in under a baby Sleeping Bag: Should it be pajamas, or are a long-sleeved bodysuit or even just a diaper enough? Or would it be better to use several layers? We’ll show you how to dress your little one for sleep and what to look out for so they can spend the night warm and snug in their Sleeping Bag.

Restful sleep: How to dress children properly at night

In general: The higher the room temperature, the more lightly your little one can be dressed at night. The most important factors when choosing the right Clothing Line in the Sleeping Bag are therefore

    • the room temperature in the bedroom and
    • the so-called TOG rating, which indicates a sleeping bag’s thermal resistance.

Experts recommend a sleeping temperature of 16–18 degrees Celsius as the ideal temperature for babies’ sleep environment.

How can you tell if your baby is cold while sleeping?

You have ensured the room is at the right temperature and chosen a Sleeping Bag with the appropriate TOG rating for the current season, but how can you tell whether your child is warm enough or possibly dressed too warmly while sleeping?

It is important to know that cold hands and little feet are not reliable indicators.

The perception of temperature and the optimal sleeping temperature vary from child to child and can differ considerably. Therefore, you should always feel your baby’s body temperature at the nape of the neck to be sure:

  • If the neck feels cold, your little one is probably too cold.
  • If the neck feels comfortably warm but not hot, the infant’s body temperature appears to be regulated appropriately.
  • If the neck feels sweaty, your child is probably too warm.

What should your child wear in the Sleeping Bag?

If you have found that your baby is either cold or sweating, you can easily regulate their body temperature by adjusting the sleepwear in the Sleeping Bag to their needs.

Our temperature chart shows you how to dress your baby appropriately at night: On the left, you will find information about the room temperature; in the columns on the right, you will find the respective TOG value of the Sleeping Bag. You can now easily see in the matrix which Clothing Line in the Sleeping Bag is appropriate:

An example:

  • In summer, your baby wears a Sleeping Bag with a TOG rating of 1.0 TOG and the room temperature is 22–24° degrees – in this case, a short-sleeved Body Suit under the Sleeping Bag is recommended.
  • If the room temperature changes to around 20–22° degrees, a long-sleeved Body Suit would be better for your little one.
  • Depending on the room temperature and TOG rating, long- or short-sleeved onesies are often sufficient, and sometimes just a diaper is all that’s needed.

  • If you feel that your baby is still too cold despite the Clothing Line, be sure to avoid placing an additional blanket over the Sleeping Bag to prevent the risk of overheating. Instead, choose a warmer Sleeping Bag.

  • For the same reason, you should also avoid a hat, because if your newborn gets too hot, excess heat is released through the head. Socks are also not suitable sleepwear with a Sleeping Bag, as they likewise pose a risk of overheating.

  • If you have any further questions about baby sleeping bags, you can find more tips in our sleeping bag guide.

  • In our Sterntaler® online shop, you’ll also find suitable non-toxic baby clothing made from skin-friendly cotton, so you can create the optimal sleeping environment for your little one. 

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