Baby sleeping bags buying guide for UK parents
Short answer: A baby sleeping bag is a wearable bag that replaces loose blankets, so your baby cannot wriggle under covers. Choose one that fits your space and your baby's stage, and use it as the instructions say.
What is a baby sleeping bag?
A wearable bag that replaces loose blankets, so your baby cannot wriggle under covers. It is used once your baby meets the maker's minimum weight (often around 4kg), through the cot years.
How to choose
- 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.
Safety standards
- Sleeping bags: look for BS EN 16781:2018.
Common questions
- How warm should a baby's room be at night?
- Is 21 degrees too hot for a baby's room?
- Is 15 degrees too cold for a baby to sleep?
- How do I know if my baby is too hot at night?
- What tog sleeping bag does my baby need?
- When can a baby use a sleeping bag?
- Are baby sleeping bags safer than blankets?
- What safety standard should a baby sleeping bag meet?
What the guidance says
- A well-fitted baby sleeping bag is an alternative to blankets. Most makers base suitability on weight (usually around 4kg) rather than age, so check the label.
- The Lullaby Trust does not publish a tog chart, because fabrics, layers and babies differ. Use the room temperature as a guide and check your baby's chest or neck.
- Avoid weighted swaddles, weighted blankets, weighted sleeping bags and sheepskins.
- Sleeping bags: look for BS EN 16781:2018.
Shop at Baby Kingdom
- Sleeping Bag, New Born to Six Months - Ocean
- Sleeping Bag, New Born to Six Months - Berry Stripe
- 2.5 Tog Baby Sleep Bag 0-6 Months
- 1.0 Tog Baby Sleep Bag 6-18 Months
Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
More advice
Can a 2 week old sleep in a sleeping bag?Keeping your baby warm in winter without overheatingCan I swaddle my baby?Can a premature baby use a sleeping bag?Can my baby wear a sleeping bag in a Moses basket?Can a 6 month old sleep with a blanket?All baby bedding and sleeping bags advice →
Sources
- 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.