whichtog.comsleep layer recommendations
What TOG for 15°C?
Baby sleeping bag and what to wear in a 15°C room
Recommended at 15°C
At 15°C, use a 2.5–3.5 TOG bag, worn over a long-sleeved bodysuit and a sleepsuit.
2.5–3.5TOG
Wear all of these together, under the bag:
Long-sleeved bodysuit
Sleepsuit or full pyjamas
Band 13–16°C
Cold room — consider heating the nursery toward 16–20°C.
Pick the bags you own and see the overnight forecast.
What TOG sleeping bag does a baby need at 15°C?
At 15°C, use a 2.5–3.5 TOG bag, worn over a long-sleeved bodysuit and a sleepsuit.
What should a baby wear to sleep at 15°C?
Dress them in a long-sleeved bodysuit and a sleepsuit (or full pyjamas), under a 2.5–3.5 TOG sleeping bag.
Why this TOG at 15°C?
John Lewis guide: 2.5–3.5 TOG at 13–16°C; Slumbersac recommends 3.5 TOG below 18°C. Love to Dream "Cold" band. The NHS and The Lullaby Trust recommend 16–20°C — below this range, actively warming the room is advised.
Safe sleep checks
- Always place your child on their back to sleep.
- Check for overheating by feeling the chest or back of neck. Remove a layer if hot or sweaty.
- Do not put a hat on your baby indoors or for sleep — babies cool down through their head, and a hat can cause overheating.
- Do not use a sleeping bag with a cot duvet or loose blanket.
- These are general guides only — every child is different.
- Ideal room temperature for sleep is 16–20°C.
- Stop using a sleeping bag if damaged or if your child can climb out of the cot.