Dress your baby just right for sleep
A free TOG calculator that suggests what to put your baby in tonight, based on how warm your room will be overnight — then the touch test confirms it.
2.5 TOG20°C overnight · 3–6m
Singlet + long-sleeve bodysuit or pyjamas + 2.5 TOG sleeping bag
Then feel baby's back or tummy — warm, not hot or sweaty.
- Safe-sleep tips from Red Nose Australia
- Newborn to 3 years
- Free · no account needed
What SleepSnug does
Everything you need,
nothing you don't
An overnight room estimate
Estimates how cold your room will get overnight from your suburb's forecast — or uses your own thermometer reading, which is better still.
A specific bag and layers
A sleeping-bag TOG and the clothes to put under it, adjusted for your baby's age and for naps or the night — not a vague temperature band.
Safety-first
Safe-sleep reminders drawn from Red Nose Australia. Flags a room that's too hot or too cold and explains why.
How it works
Three steps to a safer night
Set the temperature
Use your phone's location to pull the overnight forecast, or type in your room thermometer reading directly.
Tell us about your baby
Choose their age and whether it's a nap or the night (and describe your room, if you like). Takes about 20 seconds.
Get your recommendation
See the TOG rating, the clothing layers, and any safety flags — instantly, every night.
Quick reference
TOG by room temperature
SleepSnug refines this for your baby's age, your home and tonight's forecast — but here's the baseline.
Questions answered
Baby sleep & TOG, explained
The most common questions parents ask about dressing a baby for sleep.
What should my baby wear to sleep?
What your baby wears to sleep depends on the room temperature. At 20°C a 2.5 TOG sleeping bag with a singlet under a long-sleeve bodysuit or pyjamas is ideal. SleepSnug calculates the exact recommendation based on your room temperature, baby's age, and sleep environment.
What TOG sleeping bag do I need?
TOG rating depends on room temperature: use 3.5 TOG below 16°C, 2.5 TOG for 16–20°C, 1.0 TOG for 21–23°C, and 0.2 TOG for 24–26°C. At 27°C and above, skip the sleeping bag and use a nappy or light singlet only. SleepSnug gives a personalised recommendation based on your room conditions.
What TOG for 20 degrees?
At 20°C, a 2.5 TOG sleeping bag is recommended. Pair it with a singlet under a long-sleeve bodysuit or pyjamas; for a newborn, a long-sleeve bodysuit under the bag is enough.
What is a TOG rating?
TOG stands for Thermal Overall Grade — it measures the warmth of a sleeping bag or duvet. Higher TOG = warmer. Baby sleeping bags typically range from 0.2 TOG (very warm rooms) to 3.5 TOG (winter).
What should a newborn wear to sleep?
Dress a newborn as you would dress yourself for the room — if unsure, choose the lighter option, as overheating is the bigger risk. At 20°C, dress a newborn in a long-sleeve bodysuit under a 2.5 TOG sleeping bag. Always avoid loose blankets for babies under 12 months.
How do I know if my baby is too hot or cold at night?
Feel your baby's back or tummy — it should feel warm but not sweaty. Cold hands and feet are normal. If your baby is sweating or their back or tummy feels hot, remove a layer. SleepSnug helps you dress your baby correctly from the start based on your room temperature.
More questions (11)Fewer questions
What temperature should a baby's room be at night?
Red Nose Australia doesn't recommend a specific room temperature — around 16°C to 20°C (61–68°F) is often quoted as a general comfort guide. What matters is dressing your baby for the room and avoiding overheating, a known risk factor for SIDS: feel your baby's back or tummy — it should feel warm, not hot or sweaty. A room thermometer isn't necessary, but it can help you match their layers to the room.
What TOG for 18 degrees?
At 18°C, a 2.5 TOG sleeping bag is recommended. Dress your baby in a singlet under a long-sleeve bodysuit or footed pyjamas. For newborns, a long-sleeve bodysuit under the bag is enough.
What TOG for 22 degrees?
At 22°C, a 1.0 TOG sleeping bag is recommended, with a long-sleeve bodysuit underneath. Avoid overdressing — overheating is more dangerous than being slightly cool.
What TOG for 24 degrees?
At 24°C, use a 0.2 TOG sleeping bag with just a short-sleeve bodysuit or nappy underneath. For a baby under 3 months who isn't yet showing signs of rolling, a lightweight cotton or muslin wrap over a nappy and singlet is an alternative — a wrap or a bag, never both. Make sure the room is well ventilated.
What should my baby wear to sleep in summer?
In summer when rooms are 24–26°C, use a 0.2 TOG sleeping bag with just a nappy or short-sleeve bodysuit. At 27°C and above, skip the sleeping bag entirely — a nappy and thin singlet is safer. Always prioritise keeping your baby cool to avoid overheating.
What should my baby wear to sleep in winter?
In winter when rooms are below 16°C, a 3.5 TOG sleeping bag is recommended. Dress your baby in a singlet under a long-sleeve bodysuit or footed pyjamas. At 16–20°C a 2.5 TOG bag is enough — with a long-sleeve singlet as the base layer at 16–17°C. Avoid adding loose blankets — a high-TOG sleeping bag is safer and more effective.
Can my baby sleep with a blanket?
Loose blankets are not recommended for babies under 12 months due to the risk of suffocation and overheating. A fitted sleeping bag (sleep sack) is the safest alternative — it keeps your baby warm without the risk of covering their face.
Is 25 degrees too hot for a baby to sleep?
25°C is on the warmer side but still within a workable range. Use a 0.2 TOG sleeping bag and dress your baby in just a nappy or thin short-sleeve bodysuit. Ensure good airflow in the room with a fan. Feel your baby's back or tummy regularly — it should feel warm but not sweaty.
How many layers should a baby wear to sleep?
Red Nose Australia's guide is to dress your baby as you would dress yourself for the temperature of the room — if unsure, choose the lighter option. At a comfortable room temperature of around 20°C, that typically means a singlet and long-sleeve bodysuit plus a 2.5 TOG sleeping bag (just the bodysuit for a newborn). The TOG rating of the sleeping bag replaces the need for multiple blankets or layers.
What if I don't have the exact TOG sleeping bag recommended?
You can safely approximate the recommended TOG by adjusting the layers worn under a different bag. If the bag you own is lighter than recommended, add a long-sleeve bodysuit or footed sleepsuit underneath. If the bag is heavier, dress baby in just a short-sleeve bodysuit or nappy. SleepSnug's "Don't have this TOG bag?" panel shows you the exact safe combination based on what you own, your baby's age, and tonight's room temperature — and warns you when a bag is simply too warm for the conditions, regardless of what's underneath. Never use loose blankets for babies under 12 months.
When can babies use a duvet?
Babies should not use a duvet or loose bedding until at least 12 months of age, and Red Nose Australia strongly advises against pillows for babies and toddlers under 2 years. Before 12 months, a correctly rated TOG sleeping bag is the safest option. After 12 months, a lightweight toddler duvet (4 TOG or less) can be introduced.
From the blog