We know that dressing our little ones appropriately is not always easy. If the baby is too bundled up, they can get hot and end up sweating. But if they are dressed too lightly, they might wake up cold. So, how do I ensure my baby is dressed properly? What size is right? In this post, we answer all your questions and explain how to choose the perfect sleeping bag size for your baby. 😉
Baby sleeping bag: What size do they need?
Sleeping bags help little ones sleep safely and keep them calm during sleep. However, for the sleeping bag to protect and be safe for your baby, it's important to choose the correct size.
If the sleeping bag is excessively large, there's a risk of the baby slipping down into it. If it's too small, your little one won't have the necessary space to stretch, kick, etc.
Furthermore, sleeping bags help your child maintain the ideal body temperature. Therefore, if the bag is too large, it won't keep them warm properly, and your child might feel cold. On the other hand, if the bag is too small, it can retain heat and feel uncomfortable.
Therefore, to ensure your little one's comfort, we recommend selecting the appropriate size for their age. Below, we show you the size to choose based on their age.
Sleeping bags from 0 to 6 months

Sleeping bags from 6 to 12 months

Sleeping bags from 1 to 3 years

Sleeping bags from 3 to 6 years

Consider the TOG
When choosing a sleeping bag, we must consider a primary factor: the thickness of the material, depending on whether it's a sleeping bag for summer, winter, or mid-season.
Sleeping bags have a TOG value. TOG measures how warm the garment is. So, the higher the TOG, the warmer the sleeping bag will be. Therefore, we should consider the temperature of our little one's room to select the most appropriate TOG.
Below, we show you the table you can use as a guide:

As you can see in the table, the thermal resistance changes when the sleeves of the sleeping bag are removed. We recommend that you keep these recommendations in mind to avoid putting too many layers underneath and making your child uncomfortable.
Still, don't forget! As parents, you know your child best.
SUMMER
TOG 0.5: ideal between 21 and 26°C
MID-SEASON
TOG 1.5: ideal between 20 and 24°C.
WINTER
TOG 2 and 2.5: ideal between 18 and 21°C.
TOG 2.5: ideal for temperatures below 18°C with pyjamas or a bodysuit underneath.
So, how can I tell if they are dressed warmly enough?
Our advice is to check their temperature at the nape of their neck and on their neck. If it's warm and dry, everything is fine. However, if their neck is damp and sweaty, the baby is too warmly dressed.
What material is most suitable for baby sleeping bags?
Little ones move a lot while they sleep. Therefore, sleeping bags are designed to prevent them from waking up too hot and sweaty. Thanks to their fabric, the sleeping bag provides good air circulation, regulates humidity, and prevents bacteria from accumulating.
One of the most important factors you should consider when choosing a sleeping bag is that it is made with natural fibers and, therefore, facilitates breathability. At Petite Marmotte, we have always been committed to using materials that are respectful of health. That's why all our garments are made with organic cotton and are backed by the GOTS certificate.
Organic cotton is very breathable, making it the best material for sleeping bags. Not to mention that it doesn't contain substances harmful to children's health. Additionally, it is very soft and comfortable, as this fabric ensures proper breathability for our babies' skin and maintains heat and cold correctly.
In short, sleeping bags made with organic cotton are the best option for all skin types.
Organic cotton, your best ally!
The advantages of Petite Marmotte sleeping bags.
Our sleeping bags are essential products, as they prevent the baby from uncovering and act as a substitute for blankets and sheets. They are made with organic cotton and are designed to ensure their well-being during sleep.
It offers the comfort the little one needs and peace of mind to parents!
- Sleeping bags are made of organic cotton: soft and breathable.
- Oeko-Tex certified: European label that guarantees the absence of toxic substances for the body and the environment.
- Offer freedom of movement.
- Maintain ideal temperature and stay covered.
- No risk of suffocation: by not covering them, sleeping risks are reduced.
- Improves sleep: your baby won't uncover and will have better sleep quality.
- Save on crib bedding: You'll save a lot of money and time on crib bedding.
- Becomes part of their sleep routine: they'll know that when you put on the sleeping bag, it's time to sleep.
- Can be washed in a washing machine and tumble dryer.