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Don't Buy cot mattresses

The worst cot mattresses could pose a safety risk to your baby. Can you take that chance?

Put us to the test

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Don't put your baby's sleep at risk or waste your money on a terrible cot mattress. A Don't Buy mattress won't stand up to night after night of wriggly sleep, sick incidents and nappy leaks. Or, it will fail to give your baby the vital support he or she needs in those early days and as they grow bigger and bigger

Our tough lab tests uncover those mattresses which may let you down and highlight the cot mattresses you should avoid.

Stokke Home Bed cot mattress

We're warning parents against buying or using the Stokke Home Bed cot mattress after a failure in one of our recent tests, which we believe makes this mattress a smothering risk for babies under six months.

One of our key cot mattress tests, which became part of British Safety Standards in September 2017, investigates whether a mattress is firm enough to prevent your baby from being smothered if they roll onto their face while sleeping.

Although the Stokke Home Bed Mattress passed safety standards in force when it first went on sale in 2015, it hasn't passed our key cot mattress test and we are advising parents not to buy this mattress while the manufacturer investigates further.

Stokke said: ‘The safety and wellbeing of the babies and children using our products is our number one priority and we take your concerns very seriously. While we meet mandatory safety requirements in UK with our mattress, we have still ordered an additional risk assessment by a third party.

'We can confirm that Stokke never received any report of any injuries related to this mattress or its’ firmness on any of our crib designs.’

Stokke also said it would take immediate appropriate measures if the third party risk assessment pointed to the cot mattress being hazardous.

We'd suggest you choose a Best Buy cot mattress instead. 

Cot mattresses to avoid

We've seen cot mattresses where the springs don't go right to the edge of the mattress, where waterproofing only covers part of the mattress (so little leaks could turn into a big cleaning job in the middle of the night) and even those that could be a smothering risk (see above). 

Buy a good mattress and you'll get one that starts firm to aid safe sleep and stays firm as your baby grows, and will stay dry whatever your baby does to it. 

How we uncover the best and worst cot mattresses

Which? has reviewed the latest cot mattresses from all the big brands including Ikea, Stokke, Mamas and Papas, Mothercare and Little Green Sheep. 

Our in-depth testing means we can recommend those cot mattreses that are firm, are breathable and will help to keep your little one cool, as well as those cot mattresses which last through tough durability tests, and support your baby as he or she grows. 

  • Body support Your baby grows a lot in the first few years of his or her life, so it's crucial that the mattress you buy provides the very best support for your little one's body as a baby and as a toddler. We use dummies of different weights, simulating children of different ages, to show how well each mattress supports children, from newborn to the age of five.
  • Durability A firm mattress is a must with a newborn, and one that's going to last is something you can't tell in a shop just by looking at it. Our tough tests simulate two to three years of use on every cot mattress to see how each one holds up to wear and tear.
  • Staying clean and dry A cot mattress with a cover that's easy to whip off in the dead of the night when little (or big) accidents occur, and still looks as good as new after many, many spins in the washing machine is something worth looking out for. We assess for fiddly-to-remove mattress covers that are going to shrink over time and fabric that will end up bobbling with use, and take points off for any which could give you sleepless nights.

Cot mattress reviews you can trust

A cot mattress is a pretty important purchase. Get the right one and your baby will sleep like a baby. Which? is the only UK review site that tests cot mattresses to British Standards. Our extensive lab tests uncover mattresses that should be up to the job of providing your little one with a safe sleeping space, but aren't. Plus, we're independent, so you can be sure that our product recommendations are influenced only by our test results. 

Find out which cot mattresses are Don't Buys and which are Best Buys by joining which? today.