A baby’s airway (their breathing tube) can be obstructed if it becomes blocked, narrowed or folded. This page will give you information about how to sleep your baby in a way that helps to keep their airway open and clear.

Delicate airway

Your baby’s airway is very delicate and can easily BLOCK, NARROW or FOLD, making it difficult for them to breathe.

Some baby products and sleeping positions increase the risk of this happening:

  • Loose bedding or soft-sided pods and pillows can BLOCK your baby’s airway
  • Tummy sleeping or becoming wedged against an adult can put pressure on your baby’s chest and NARROW their airway 
  • Sleeping in a sitting position or sling, causing your baby’s chin to touch their chest, can FOLD your baby’s airway

Restricted baby's airway blocked


Restricted baby's airway narrowed


Restricted baby's airway folded


Keeping baby’s airway clear 

  1. Keep your baby’s face clear
  2. Place your baby on their back in their own cot or Moses basket
  3. Always sleep your baby on a firm, flat surface

Let’s look at each of these in more detail.

🟡 1. Keep your baby’s face clear

Remove all unnecessary items and all loose bedding from your baby’s cot, including toys, pillows and cot bumpers. The safest cot is a clear cot. Clearing the cot not only reduces the risk to a baby’s airway (breathing tube) but also reduces the risk of sudden infant death syndrome (SIDS).

Young babies often prefer to breathe through their noses which is why we advise keeping the whole face clear.


baby's airway breathing restricted clear cot

🟡 2. Place your baby on their back

A baby’s airway can become narrowed when sleeping on their front (prone) as it puts pressure on their chest. In this position, it is also easier for a baby to choke on any vomit due to the positioning of the windpipe (respiratory tract) and food pipe (oesophagus). This is shown in the diagram below.



baby's airway open laid on back breathing

Sleeping baby on their back keeps the windpipe and food pipe open




baby's airway breathing restricted sleeping on front

Sleeping baby on their front can block the windpipe and food pipe


In addition, if the surface is cushioned or padded, lying face down can limit the flow of oxygen.

The safest way for your baby to sleep is on their back, in their own cot or moses basket.

🟡 3. Sleep your baby on a firm, flat surface 

Babies sleep a lot (even if it doesn’t seem like it sometimes!). They can (and do) fall asleep in places that are not designed for them to sleep in, and which are not firm and flat.  If your baby falls asleep in a baby bouncer, rocker, reclining chair, or when propped in a sitting position, it’s best to move them onto a clear, firm, flat surface.

Even if your baby is awake, always make sure their head is not slumped onto their chest and that their nose and mouth are not covered. Babies have heavy heads and short necks. This means that their head can easily flop down onto their chest, restricting their airway and stopping oxygen from getting to their lungs. This is a particular risk in the first few months of a baby’s life.

The diagram below shows how sleeping on their back, in a firm, flat sleep space help to keep a baby’s airway clear and open.


baby's airway open anatomy laid on back breathing

Sleeping on a flat surface keeps baby’s airway (breathing tube) open



baby's airway breathing restricted anatomy seated position

Sleeping in a sitting position can block baby’s airway (breathing tube)


Products that can restrict baby’s airway

There are a lot of products available for babies to sit in and sleep in. Some of these might not provide the safest position to protect your baby’s airway. If your baby falls asleep in a product similar to the ones shown below, move your baby onto a firm, flat, clear space, such as a cot or moses basket.

We advise against letting babies sleep in the following:

  • Anything that keeps them in a seated or inclined position such as, bouncy chairs, swings, hammocks, and beanbags
  • Sleep positioners or anything that restricts a baby’s ability to roll

We also advise against using duvets and cot bumpers, as well as thick, heavy or weighted bedding.


baby's airway breathing restricted in a bouncer

Baby bouncer


baby's airway breathing restricted in a hammock

Baby hammock


baby's airway breathing restricted blankets in cot

Cot bumpers, thick bedding, duvets


baby's airway breathing restricted in a swing

Baby swing


baby's airway breathing restricted in a beanbag

Baby beanbag


baby's airway breathing restricted sleep positioner

Sleep positioner

It is also very important to keep your baby’s airway clear when using a sling or car seat.