TOG ratings can be confusing at first, but once you understand them, choosing the right sleepwear for your baby becomes much simpler. We explain what TOG means, how to match the right rating to your baby’s room temperature, and which sleepwear options work best across different seasons. Get it right and your baby sleeps more comfortably — and safely — all year round.
BubScout Guide
Choosing a baby sleeping bag can feel confusing, especially when TOG ratings are involved. TOG is simply a way to describe how warm a sleep bag is. A higher TOG provides more warmth, while a lower TOG provides less warmth. Understanding TOG can help you dress your baby comfortably for sleep, based on the conditions in their room rather than guesswork.
1. What Does TOG Mean?
TOG stands for Thermal Overall Grade. It is a standard way of measuring how much warmth or insulation a sleeping bag provides. A sleep bag with a higher TOG traps more warmth, while a lower TOG allows more heat to escape.
TOG ratings are helpful because they give you an easy way to compare different sleeping bags and choose one that suits the conditions in your baby’s room. Instead of guessing based on thickness or weight, you can look at the TOG rating and the manufacturer’s guide for how to dress your baby underneath.
2. Lower TOG vs Higher TOG
A simple way to think about TOG is:
- Lower TOG = for warmer conditions
- Higher TOG = for cooler conditions
In Australia, baby sleeping bags commonly range from around 0.2 TOG (very light and breathable) up to about 3.5 TOG (much warmer and more insulating). Lighter TOG bags are often used in warm rooms or during summer, while higher TOG bags are usually chosen for cooler rooms or winter conditions.
Remember, the right TOG depends on the temperature of your baby’s sleep environment and what they are wearing underneath the bag.
3. Don't Choose TOG by Age Alone
It can be tempting to pick a sleeping bag based on age labels alone, but TOG selection should be based mainly on the temperature and conditions of your baby’s sleep environment. Two babies of the same age may need very different TOG ratings if their rooms are different temperatures.
Instead of relying only on age, consider:
- The typical temperature of your baby’s room, day and night
- The season and local climate where you live in Australia
- What your baby will wear underneath the sleeping bag (for example, a singlet, short-sleeve or long-sleeve layer)
Age ranges on packaging can be a helpful guide for size, but they are not a reliable way to choose warmth. Always consider the room temperature first.
4. Always Check the Manufacturer's Guide
Not all sleeping bags are made the same way. Different brands can use different fabrics, construction methods and layers, even for the same TOG rating. Because of this, it is important to follow the TOG and clothing guide supplied with your particular sleep bag.
Most reputable brands provide a chart or guide that suggests what baby might wear under the sleeping bag for a range of room temperatures. Use this as your starting point and adjust based on how your baby feels.
If you change to a different brand or style of sleeping bag, check the new guide rather than assuming the same clothing will always be suitable.
5. Avoid Overheating
Overheating is an important safe-sleep consideration. Babies can become too warm if they are dressed in layers that do not suit the room temperature or if a very high TOG is used in a warm environment.
To help avoid overheating:
- Choose a TOG that matches the conditions in your baby’s room
- Dress your baby in light, breathable layers underneath
- Avoid adding extra blankets over a sleeping bag
- Adjust layers if the room temperature changes
The goal is for your baby to feel comfortably warm, not hot or sweaty.
6. How to Check if Baby Is Comfortable
Every baby is different, so it is helpful to check how your baby feels in their sleeping bag. A simple way to do this is to feel their back or tummy under their clothes.
Your baby is usually comfortable if they feel warm, but not hot, sweaty or clammy. If they feel very warm or damp, they may need a lighter layer or lower TOG. If they feel cool on their back or chest, you may need to adjust their clothing or consider a higher TOG, based on the room conditions and manufacturer’s guide.
Cool hands and feet are common in babies and do not always mean your baby is too cold. Focus on the core of their body when checking for comfort.
7. Safe Sleeping Bag Checklist
When you are choosing and using a baby sleeping bag, this simple checklist can help you focus on key safety points:
- Correct TOG for the conditions — matched to the room temperature and manufacturer’s guide
- Correct size for baby — not too big or too small
- Fitted neck and armholes — so baby cannot slip down inside the bag
- Baby's arms free — so they can move and use their hands
- No hood — sleeping bags should not have hoods attached
- Head and face uncovered — keep bedding away from the face
- Follow the manufacturer's clothing and layering guide for your specific bag
BubScout Tip
A higher price doesn’t automatically mean a higher or better TOG. Some premium sleeping bags are designed for warmer conditions and have a low TOG. Always check the TOG rating and the manufacturer’s guide, and choose what suits the temperature in your baby’s room.
