Everything parents need to know about creating a safe sleep environment for babies from birth to 12 months — based on current NHS, Lullaby Trust, and AAP clinical guidelines.
In the UK, around 200 babies die from Sudden Infant Death Syndrome every year. The majority of those deaths are associated with at least one modifiable risk factor — something that could have been changed. This guide tells you exactly what those risk factors are and what to do about them tonight.
Back to sleep. Every sleep. Every nap. Every time. No exceptions.
This is the single most evidence-based intervention for reducing SIDS risk. Since the NHS Back to Sleep campaign launched in the 1990s, SIDS rates in the UK have fallen by over 80%. That one behaviour change saved thousands of lives.
The cot should be clear. No pillows, no duvets, no bumpers, no nest pods, no sleep positioners, no soft toys, no loose blankets. None of them.
Products marketed as safe sleep aids — nest pods, anti-roll wedges, sleep positioners — are not recommended by the NHS or the Lullaby Trust. There is no evidence they reduce SIDS risk, and some evidence that certain products increase it by restricting airflow.
Use a firm, flat, waterproof mattress that fits snugly with no gaps at the sides. Use a baby sleeping bag rated to the correct TOG for the room temperature. That is all the bedding your baby needs.
The recommended room temperature for a baby's sleep environment is 16–20°C. Overheating is an independent risk factor for SIDS. Use a room thermometer. Do not judge temperature by touch — hands are always cool. Check the back of the neck or the chest.
Smoke-free environment. This is non-negotiable. Smoking in the home or car — by anyone — doubles the risk of SIDS.
The single most dangerous place for a baby to sleep is a sofa or armchair. If you fall asleep feeding your baby on the sofa, the risk of SIDS increases dramatically. This is not about being a bad parent. It is about exhaustion. Plan for it — if you think you might fall asleep feeding, move to your bed first.
Keep your baby in your room — in their own sleep space — for every sleep for the first 6 months. Room-sharing without bed-sharing halves the risk of SIDS.
NHS Safe sleep guidance · Lullaby Trust SIDS prevention · NICE CG37 Postnatal care · Reviewed April 2026.