How do I choose a baby sleeping bag?
Short answer: Start with safety and fit, then practicalities. 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.
- 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
- 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.
Related questions
What is a baby sleeping bag?
A wearable bag that replaces loose blankets, so your baby cannot wriggle under covers.
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Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
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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.