How do I keep my baby warm in winter at night?

Here is the detail behind that answer, taken from current UK guidance from the NHS and the Lullaby Trust.

Things to check

• Choose the right size for your baby's weight so the neck and arm holes are snug and they cannot slip down inside.
• Pick a tog for your room temperature and adjust the clothing underneath.
• Avoid weighted sleeping bags, and do not use a hood or extra blankets on top.

What the guidance says

• Never use a hot water bottle or electric blanket, and do not place the cot next to a radiator, heater or fire, or in direct sunlight.
• Check your baby's temperature by feeling their chest or the back of their neck. Cool hands and feet are normal.
• Pillows, duvets and quilts are not recommended for babies under 12 months because of the risk of overheating and the head being covered.

Related questions

What is a baby sleeping bag?

A wearable bag that replaces loose blankets, so your baby cannot wriggle under covers.

Shop at Baby Kingdom

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• Sleeping Bag, New Born to Six Months - Eucalyptus
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• Sleeping Bag, New Born to Six Months - Ocean Stripe

Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.

More advice

Sources

• NHS: Sudden infant death syndrome (SIDS) (accessed 2026-10-21)
• The Lullaby Trust: Baby mattresses and bedding (accessed 2026-10-21)

General information only, not medical advice. Always follow your product's instructions. If you are worried about your baby, contact your GP, health visitor or 111. In an emergency, call 999.