Creating a safe sleep environment for a baby will be a top priority for most parents. After you’re done searching for the best bassinets and cots, one key item to consider is a baby sleeping bag.
While blankets can be tucked into a mattress, infants can kick these off and loose bedding can be a huge safety risk. Jenny Ward, Chief Executive of The Lullaby Trust, states that baby sleeping bags help “to keep the baby’s sleep space clear, which reduces the risk of their head or face becoming covered if they wriggle around while they sleep”.
These sleep sacks come in different weights and materials to suit whatever temperature your baby is sleeping in - whether that be a roasting heatwave or a freezing cold night. The most common are 1.0 for the summer and 2.5 for the rest of the year. However, this round-up includes other options as well.
Read more: Best baby snowsuits to keep your little one warm
The best baby sleeping bags for 2026 are:
- Best overall – Sweet Dreamers sleeping bag: £31.99, Sweetdreamers.co.uk
- Best budget buy – Halo sleepsack: £19.99, Amazon.co.uk
- Best multibuy – ErgoPouch sleeping bag pack: £22.46, Ergopouch.co.uk
- Best for newborns – Folk and Thread organic sleep bag: £30, Boots.com
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Sweet Dreamers sleeping bag
Best: baby sleeping bag overall
Why we love it
- Two-way zip
- Soft and stretchy design
- Exterior tog labelling
Take note
- Cheaper rivals available
- More limited prints than some others
If you want the reassurance of expert-backed baby sleeping bags, look no further than Sweet Dreamers. This family-run UK business partnered with The Lullaby Trust on the design of the products, and donates profits towards the charity as well.
The bamboo blend fabric in 1.0 tog (2.5 is also available) is undeniably soft and stretchy, making wrestling wriggly babies such as mine into it as easy as pie and allowing for plenty of movement. The two-way zip system means that dreaded middle of the night nappy changes don't require the bag to be taken off, while the armhole sizes can be tightened with the included poppers. The bag sits nice and snug under my baby’s chin, while the exterior label clearly displays the tog so you know whether you’re matching the right temperature for the room.
Put simply, this is the baby sleeping bag I reach for most nights, and the charming starry print is the icing on the cake. Plus, you get a small discount when you buy multiple bags. There are cheaper options and brands with a greater variety of prints, but they aren’t as easy to use and don’t offer as many adjustable features.
Key specifications
Buy now £31.99, Sweetdreamers.co.uk
Halo sleepsack
Best: budget baby sleeping bag
Why we love it
- Affordable price
- Inverted zip
- Comfortable material
Take note
- Only 0.5 tog available
- None adjustable sleeves
Need to stick to a budget but still want a tried and tested brand? The sleepsacks from Halo – the brand used by over 1,700 US hospitals – are the way to go. For £20 you get a stretchy yet soft 100 per cent cotton bag which features an upside down zip. That may seem odd at first, but it means you can easily free your baby’s lower half for nappy changes without exposing their entire body.
Five prints are available, including this Winnie the Pooh version for any future Disney fans. That said, they are all only available in 0.5 tog, which is great for warm rooms, but may not be the best if your baby’s sleep space is on the colder side. The sleeves also don’t have adjustable poppers, though I found they were a snug enough fit on their own.
Key specifications
Buy now £19.99, Amazon.co.uk
ErgoPouch sleeping bag pack
Best: multibuy bag sleeping bag
Why we love it
- Easy to put on
- Two-way zip
- Many togs and designs to choose from
Take note
- Individually more expensive
- No poppers for arms
Some nights call for different layers, or there may be unexpected changes needed. Getting several baby sleeping bags ensures you’re prepared, and award-winning Australian brand ErgoPouch offers some generous savings of up to 20 per cent off when you buy multiple.
My teeny snoozer tested out the summer pack, which includes a standard 1.0 tog as well as an usually light 0.2 tog – perfect for keeping baby snug during a dreaded heatwave. However, there are different packs for different seasons and you can mix and match prints (including limited edition options). Both bags have a nice amount of stretch, allowing for plenty of last-minute kicks before bedtime. Other thoughtful features such as double zips for quick nappy changes and exterior tog labelling are a big plus.
Keep in mind that buying one standalone isn’t the cheapest option, and the armholes aren’t adjustable as they are on rivals.
Key specifications
Buy now £53.52, Ergopouch.co.uk
Folk and Thread organic baby sleeping bag
Best: baby sleeping bags for newborns
Why we love it
- Black on white sensory pattern supports early development
- Long-lasting, quality design
- Slot for pram straps on 3 months+ bags
Take note
- Multiple poppers can be tricky for wriggly babies
- Older sizes are more expensive
Black and white sensory designs have been proven to be beneficial for infant sight development in the early months, and Folk and Thread (another partner with The Lullaby Trust) have taken this into account with their signature wildwood print sleeping bag. This year-round 2.5 tog weight will keep your baby toasty throughout the night. This bag has great adjustability levels, with both poppers to tighten the armholes, and additional ones on the back to bring up any excess length trailing behind.
For babies over the age of three months, you’ll get the option of an opening on the back to slot pram straps through. That said, the curved zip design and multiple poppers can be challenging with a lively infant. There’s also a lot of material to put to one side when doing a nappy change, and a decent jump in price between the age ranges of the bags.
Key specifications
Buy now £30, Boots.com
Mamas and Papas dreampod sleep bag
Best: baby sleeping bag for aesthetics
Why we love it
- Gorgeous design
- Two-way zip
- Adjustable sleeves
Take note
- Pricey when not discounted
- Designs vary differently
This twee strawberry-printed dreampod sleeping bag from Mamas and Papas is undoubtedly the prettiest of the bunch thanks to its delicate material and frilly picot collar. The double zip makes emergency nappy changes easy, while poppers on the sleeves allow for a closer arm fit. Inside, the jersey lining is soft on delicate baby skin, while the outer cotton lining is breathable, though there isn’t much stretch for big leg kicks.
While many dreampod bags are available from Mamas and Papas, this particular one is only available in a lighter 1.0 tog weight. In addition, designs that parents of boys may prefer don’t have a centre zip, which I find to be the easier option for nappy changes. These bags are more affordable when on sale. But at full price, rivals offer better value.
Buy now £25.6, Mamasandpapas.com
Folk and Thread organic summer sleeping bag
Best: baby sleeping bag for travel
Why we love it
- Great for hot holidays
- The three month+ bag is designed to slot around pushchair straps
- Affordable price
Take note
- Zip and poppers can be fiddly
- Not as soft or stretchy as rivals
Bulkier sleeping bags can take up a fair bit of a room in a baby bag, but you won’t have that issue with this lightweight gender neutral option from Folk and Thread. Designed for the summer months in a 0.5 tog in organic cotton, it packs down super thin, making it a great option for travelling during the hotter months. Like its year-round sibling, there’s a slot for pram straps at the back.
While the material isn’t as soft or stretchy as others, I’ve noticed it dries quicker – helpful if you need to put it through an emergency wash and be ready to wear soon. I did however find the zip and poppers difficult to navigate when my baby was fighting getting ready for bed.
Buy now £28, Boots.com
Jojo Maman Bebe muslin sleeping bag
Best: baby sleeping bag for breathability
Why we love it
- Gorgeous prints
- Long lifespan
Take note
- One-way zip
- Fiddly poppers
While this 1.0 tog from Jojo Maman Bebe isn’t the thinnest sleeping bag in the chart, the muslin material is lightweight, gentle on skin and super breathable, making it a good choice for summer and babies that run hot. This pale pink ditsy print is beautiful, and there are several other designs to choose from.
While taking off the shoulder straps and unzipping the bag is a breeze to get off, aligning all the poppers can be a tad tricky. In addition, as it fits such a wide age range, there is a lot of excess fabric for my baby, and the side popper that is meant for adjusting the length doesn’t seem to make much of a difference.
Key specifications
Buy now £28, Next.co.uk
Mori clever sleeping bag
Best: baby sleeping bag for longevity
Why we love it
- Large age range
- Luxury material
- Two-way zip
Take note
- Expensive
- ‘Temperature regulating’ claim not applicable for extreme weather
Of all the sleeping bags we tested, Mori’s clever 1.5 tog bamboo and cotton sack was the plushest, which is reflected in the high price tag. That said, you do get an extremely long life span with this bag, as it lasts from newborn all the way to two years old - with poppers to adjust the sleeves and length as your baby grows.
While the front flap is mainly for allowing pram straps through, I personally found it useful for quick glances at nappies with pee indicator lines without having to completely unzip my little one. If you do need to change, then the double zip makes things simpler. While Mori advertises this bag as “temperature regulating”, you should still adhere to proper guidelines, especially in the heat – a 1.5 tog bag may be too warm during the summer.
Key specifications
Buy now £65, Amazon.co.uk
ErgoPouch sleep suit bag
Best: baby sleeping bag for toddlers
Why we love it
- Toddlers enjoy their freedom
- Safer for toddlers on the move
- Sizes available up to six years
Take note
- Not as easy for nappy changes
- Expensive compared with traditional sleeping bags
As your baby grows into a toddler, they may resent having their legs restricted. Fortunately, ErgoPouch has an option that still allows them to stay warm with this sleep suit bag. My tiny tester used the 2.5 version with sleeves, but there are many togs and stunning prints on offer.
The multi-zip design allows you to choose between having a traditional sack, or opting for a pair of ‘legs’ for more freedom of movement, with stretchy side panels to support this. Even the feet have grippy pads, something especially useful for toddlers who may need a middle of the night toilet trip. The downside is that nappy changes are a bit of a faff, and getting the bag on results in more fussing from babies who loathe having sleeves put on – my little fusspot being a prime example.
Key specifications
Buy now £52.46, Amazon.co.uk
Love to Dream swaddle up 2-in-1 transition bag
Best: baby sleeping bag for swaddled babies
Why we love it
- Removable zip-off wings
- Two-way zip
- Lightweight material
Take note
- Non-adjustable sleeves with larger holes
- Short lifespan
If your baby is transitioning out of a swaddle, this bag from Love to Dream includes removable wings, depending on whether your baby can roll or not. For full transparency, my testee is very much on the move, so she slept with her arms out. The wings very easily zip off, though they do have a wide gap with no poppers to make the fit tighter. This bag also has quite a short lifespan of three months, so is really only suitable if you’re looking for something that bridges the gap between sleep positions.
Shortfalls aside, the fabric is stretchy and comfortable, the shape allows for plenty of room in the hips and the two-way zip makes nappy changes a dream. This range also has the largest choices of prints available of any brand in the chart, including multiple fabrics and five tog weight options.
Key specifications
Buy now £32.99, Amazon.co.uk
Your questions about sleeping bags for babies answered
What is the best sleeping bag for babies?
The baby sleeping bag that stands out from the pack is from Sweet Dreamers. This is thanks to its soft and stretchy bamboo blend fabric and two-way zip, making it the easiest to get on and off – something extremely vital when you’re trying to get your baby to bed and they’re fighting you every step of the way (those sleep regressions hit hard). Add onto this the snug neck fit, underarm poppers for adjustable sleeves and the charming prints, and this one is hard to beat.
If you’re on a budget and don’t mind a sleeping bag on the lighter side, Halo’s 0.5 tog with its inverted zipper is just as easy to use, and comes in under £20. Or, if you’re looking to buy several bags in one go and want a wide choice of designs, ErgoPouch has some tempting multibuy savings.
How I tested baby sleeping bags
My baby used every sleeping bag in this chart across two months, testing them both at home and away in temperatures ranging between 16-25C. The brands featured are either trusted household names that IndyBest frequently recommends in the Parenting section, or companies that work with sleep safe organisations to design their products. We’ve not featured anything that does not meet British safety standards. Beyond my baby just wearing the sleeping bags in her cot, I kept the following elements in mind:
How to create a safe sleep environment
The Lullaby Trust has six simple tips to reduce the risk of SIDS (sudden infant death syndrome):
More information on safe sleeping is available here, and there is also a page dedicated to SIDS.
What is a tog, and which should I use?
Tog stands for ‘thermal overall grade’ and it measures how well a product retains heat. The tog you choose depends on the room temperature, what your baby is wearing, and your baby’s individual needs. These are the most common options:
If you’re wondering what temperature your baby’s sleep space should be, Jenny Ward, Chief Executive of The Lullaby Trust, has some advice: “A room temperature of 16-20C is ideal for babies (we recommend using a room thermometer to monitor this) so make sure you choose the tog rating based on the temperature of the room your baby is sleeping in, rather than the weather outside or the time of year.
“You do not need to add another layer or blanket on top, because your baby’s sleeping bag is their bedding.”
Bags from Sweet Dreamers, ErgoPouch and Folk and Thread include a physical thermometer and layering guide with their bags, and many other brands have them online. The Lullaby Trust also has its own page dedicated to dressing babies for sleep.
Should a baby sleeping bag be washed after every use?
Unless your baby has had an accident or has been sick on their sleeping bag, they don’t need to be washed every day. Most manufacturers recommend every 3-4 days to keep the fabric clean.
At what age can babies wear sleeping bags?
Choosing the correct size is just as important as picking the right tog, as the bag must fit your baby’s weight correctly to ensure it fits securely around the neck and armholes. The ‘age’ is a guide only – my baby was between two sizes for some, so it’s important to weigh and measure them first.
If your baby is newborn, some bags cater from 7lbs – though many that are from 0 months have a higher minimum weight limit. Always check with the seller before you use it on your baby. In addition, choose a baby sleeping bag that complies with British safety standards (the code for this is BS EN 16781:2018), which means it won’t fall apart or easily catch fire. Every bag in this chart has this certification.
Jenny Ward stresses the importance of a well-fitted sleeping bag: “The baby’s head should not be able to slip through the neck opening. We also remind families to never leave the sleeping bag partially unfastened, as it may no longer fit safely and securely.”
What’s the difference between a swaddle bag and a baby sleep bag?
Swaddling is used to prevent the moro reflex (a startle response that sees babies extend their arms and legs then retract them), which babies grow out of naturally over the first few months. Swaddle bags usually include ‘wings’ that baby’s arms can be placed in, rather than using a blanket. Baby sleeping bags do not have these wings, and are typically sleeveless.
The Lullaby Trust takes a neutral stance on swaddling, but has more advice on choosing a swaddle bag and what to look for in swaddling here. The most important thing to be aware of is that once babies can roll, it is not safe to swaddle them.
Can I still use a baby sleeping bag in hot weather?
It depends on how hot your room is. We have sleeping bags in this chart with togs as low as 0.2, but you must keep a close eye on the temperature of the room. If it exceeds the maximum recommended temperature (usually 27C) for using a sleeping bag according to guidelines, your baby may have to go without.
Jenny also advises regularly checking on your little one for any signs of overheating. You can do this “by feeling their chest or the back of their neck. If they feel sweaty or clammy, this can be a sign they are getting too hot, so remove a layer of clothing or use a lower tog sleeping bag. If the room is very warm, you may need to remove the sleeping bag altogether.”
If I’m co-sleeping, can I still use a baby sleeping bag?
If you choose to co-sleep, then Jenny says you can still get benefits from a sleeping bag: “If bed sharing, using a baby sleeping bag is a good way of giving your baby their own bedding, while keeping adult bedding away from them.”
Why you can trust IndyBest reviews
Hannah Cowton-Barnes been reviewing various products for a number of years, with bylines at Tech Advisor and Expert Reviews. This includes baby playmats, pregnancy pillows and the latest gadgets. With the help of her eight-month old, she tested every product in this round-up fairly and rigorously, putting the buyer’s needs first.
