Can a 4 month old sleep with a duvet?
Short answer: No. Pillows, duvets and quilts are not recommended for babies under 12 months. The 12-month point is about 8 months away.
Babies change fast, so the answer depends on your child's age, weight and development, and on your product's instructions.
What the guidance says
- Pillows, duvets and quilts are not recommended for babies under 12 months because of the risk of overheating and the head being covered.
- The Lullaby Trust says soft or bulky bedding such as quilts, pillows and duvets has been shown to increase the risk of SIDS by three times.
- Keep the cot clear: no pillows, duvets, cot bumpers, loose blankets, soft toys, pods, nests, wedges or anything to keep your baby in place.
Shop at Baby Kingdom
- Flair Nadia Single Montessori Floor Bed
- Flair Explorer Playhouse Shorty Bed White
- Obaby Gatsby Single Bed
- Hoppekids Shorty Bunkbed
Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
More advice
Can a toddler use a cot bed mattress in a toddler bed?When can a baby sleep with a duvet?Can a 2 year old sleep in a toddler bed?When can a baby have a pillow?Your 3 year's sleep space: a safe-sleep guideIs your toddler ready for a toddler bed?All toddler beds and big-bed moves advice →
Sources
- The Lullaby Trust: Baby mattresses and bedding (accessed 2026-10-21)
- NHS: Sudden infant death syndrome (SIDS) (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.