Mother and Baby

Guide: to choosing the right baby sleeping bag

Section: Sleep

A baby sleeping bag is a great option for new parents worried about how their baby is sleeping at night. Essentially, they’re a wrap-around blanket for your baby to cocoon themselves inside of and there’s loads of benefits to using them instead of traditional duvets and blankets.

Not only are baby sleeping bags great for keeping your baby comfortable and happy through the night, but according to the Lullaby Trust, a baby sleeping bag is amongst the essentials for a safe night's sleep for your baby as they can reduce the chance of sudden infant death syndrome (SIDS)

What is a baby sleeping bag?

Much like sleeping bags for adults, a baby sleeping bag is an all-in-one comfort option which your baby can sleep inside of. As your little one twists and turns in the night, they won’t get tangled up in sheets and their head will remain safely uncovered.

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What are the benefits to baby sleeping bags?

When adjusted correctly – fitting snugly but comfortably around the neck – a sleeping bag will mean your baby breathes easy all night. There’s also the added benefit of keeping your little one at the same temperature throughout the night, which could mean fewer instances of waking up in the night (hopefully)!

baby sleep tog

How should my baby fit inside their sleeping bag?

Like the neck hole, baby’s arms should fit snugly through the arm holes, so that they can’t pull them back inside the bag. Sleeping bags are normally designed with poppers so that size can be adjusted for smaller babies, and to make changing nappies and feeding easier. All bags should conform to the new British standard for baby sleeping bags (BS 8510:2009).

Which tog count should my baby sleep bag be?

The tog count on a sleeping bag determines how heavy the fabric is, just like grown up sleeping bags. But unlike grown up sleeping bags, your baby will be unable to adjust themselves to a comfortable temperature so it’s important you make the right choice.

As a general rule, the warmer the room, the lower the tog should be.

For under 14 degrees Celsius, pick a tog of 3.5, and for sleeping in a room above 25 degrees Celsius, a maximum tog of 0.5 will be enough.

A 2.5 tog is perfect for 17 – 21 degrees, and between 22 – 25 degrees pick a lightweight 1.5 tog count.

Baby sleeping bag tog count

What should my baby wear inside the baby sleeping bag?

In warmer temperatures, dress your baby in a short-sleeved cotton body suit, but for cooler nights more coverage will be necessary. A lightweight cotton body suit will be appropriate for mild nights, and in the cold, layer a sleep suit over the top.

Check out our pick of the best baby sleeping bags here.


  • Author: Lorna White Lorna White
  • Job Title: Digital Writer

Lorna is the digital executive and regular contributor for Mother&Baby. After running the Yours magazine website which specialises in content about caring for kids and grandchildren, she has now brought her expertise to the UK's #1 leading pregnancy and parenting magazine. Lorna specialises on a range of topics from potty training and nutrition, to everything and anything that will keep your tot occupied!

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