Mother and Baby

Your baby sleeping bag guide

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 wearable blanket for your baby to cocoon themselves inside of and there are 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). They've put together this helpful guide to buying safer sleep products for your baby

What is a baby sleeping bag?

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

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 correct temperature through 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 armholes, 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).

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

What tog sleeping bag suits my baby?

The tog rating on a sleeping bag determines how heavy the fabric is, just like grown-up sleeping bags. But unlike grown-up sleeping bags, your baby is unable to adjust themselves to a comfortable temperature so choosing the right tog is important. 

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

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.

sleep tog bag

0.5 tog baby sleeping bag

This one is ideal for the summer months, when your baby's room temperature varies from around 21-27 degrees Celsius. You can also buy a 0.2 tog if your baby's room ever gets over 27 degrees Celsius on those very hot and sticky nights, or if you're abroad somewhere warm. 

What should my baby wear inside the 0.5 tog baby sleeping bag? 

If over 27 degrees Celsius, dress your baby in a vest for bed. They can also wear a vest between 21-27 degrees Celsius, but you may choose to dress them in a vest with short sleeves and short legs depending on how you think the temperature will change during the night. 

1 tog baby sleeping bag

A one tog sleeping bag is made for when temperatures are between 21 and 24 degrees Celsius, making it ideal for most of the British spring and summer seasons (apart from those scorching hot days). 

What should my baby wear inside the 1 tog baby sleeping bag? 

On the warmer nights when it's between 21-24 degrees Celsius, they should be fine in a vest with short sleeves. When it's a cooler 18-21 degrees Celsius, they can wear a vest with short sleeves and short legs or a baby grow with feet. 

1.5 tog baby sleeping bag

A 1.5 tog is a lightweight sleeping bag, ideal for daytime naps and the summer. 

What should my baby wear inside the 1.5 tog baby sleeping bag? 

Most babies would sleep comfortably in a short-sleeved baby grow in this sleeping bag. 

2.5 tog baby sleeping bag

These thicker sleeping bags are made for when the temperature is cooler at 15-21 degrees Celsius, making them ideal for the autumn/winter months in the UK 

What should my baby wear inside the 2.5 tog baby sleeping bag? 

When it's 18-21 degrees Celsius, pop your baby in a vest with short sleeves or a vest with long arms. For the colder nights, when it's around 15-18 degrees Celsius pop them in a vest and baby grow to keep them nice and cosy. 

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  • 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!

Other contributors

Emily Thorpe - Digital Writer

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