Top five cot mattresses for 2021
When cot mattresses cost anything up to £300, you want to know your hard-earned cash gets you the best for your baby.
A great cot mattress should be firm enough to provide great body support for your baby as their bones rapidly grow, durable enough to last until they're ready to move on to a junior bed, and completely safe so you know your child is at no risk.
With our most expensive Don't Buy costing £250, and our cheapest Best Buy £45, we have found that quality and safety does not always go up with price.
Our robust and impartial lab tests have uncovered the very best cot mattresses on the market – and found those that are unsafe to use.
Below, we have picked out our top five highest-scoring cot mattresses that are available to buy in 2021, so you can be sure you are buying the best.
All our top five cot mattresses have performed well in our body support, durability, and safety tests.
The five best cot mattresses
Table last updated 22 December 2020.
The cot mattresses to avoid
We test all our cot mattresses to the British Safety Standard BS EN 16890:2017. While meeting this standard is voluntary, manufacturers are strongly encouraged to meet it in order to minimise risks and hazards for babies and young children.
Below we have highlighted any cot mattresses that have failed our safety tests to such an extent that we have placed a safety alert on them. You should not buy these cot mattresses.
Table last updated 22 December 2020
How we test our cot mattresses
All our cot mattresses are put through robust, extensive and independent testing, all so you can have complete confidence in our results.
A cot mattress needs to provide great body support for your growing child. We use a 12kg and a 20kg dummy to test how well the cot mattress supports a baby and a toddler.
If the mattress claims to be reversible, we test each side of the mattress with both dummies. This body support test shows us if the mattress keeps your child's body totally supported – helping them stay settled while asleep.
We conduct our safety tests to the BS EN 16890:2017 safety standard for cot mattresses. This means we test for:
- Suffocation hazards We test the firmness of each mattress to ensure it doesn't pose a suffocation risk. We also check that labels and decals cannot be detached or loosened, and that a child cannot accidentally access the inner materials of a mattress.
- Choking hazards Any part considered grippable by a child and small enough to be potentially swallowed poses a choking risk, so we test to ensure nothing can easily detach or break away from the mattress.
- Entrapment hazards We measure cot mattress dimensions to ensure they'll fit smugly and flat into the cot beds their made for. This is to ensure no gaps larger than 3cm can form between the mattress edge and cot bed. Gaps could lead to a child trapping a part of their body and injuring themselves.
- Sharp edges We check the mattress for sharp edges or points both at the start and end of testing to ensure there's no feature your child can cut or hurt themselves on.
A cot mattress needs to last for at least two to three years of continual use – right up until your child's ready to move on to a junior bed. Our durability testing replicates two to three years of jumping, sitting and sleeping on the mattress.
We then record any changes, including damage, done to the mattress. A good mattress should be able to go through our durability tests without a large change in firmness or significant loss of height.