Firmness
Type
Foam
Depth (cm)
14
Number of Layers
2
Trial Period (nights)
Warranty (years)
5
Price Range
£159
Best Sleeping Position(s)
Certifications
Assessed from MattressNextDay's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
The main reason to pick this one is practicality. The waterproof cover unzips for the washing machine and wipes clean for smaller spills, which means you're not scrubbing at a foam core after an accident. The EcoFoam® layer is firm and pressure-relieving, giving growing bodies proper support, and it's naturally dust mite resistant and hypoallergenic. Parents who care about materials will like that the foam is 100% recycled and the mattress is vegan friendly. At £159 with a 5-year guarantee, it sits at a sensible price for a children's mattress that should last through the primary school years. It meets the BS 7177 domestic flammability standard, tested to Source 5 fire retardancy.
Key Features & what's inside
- EcoFoam®. A firm, orthopaedic foam layer made from 100% recycled and re-engineered foam, which means solid, even support for a growing child. It's highly breathable, pressure-relieving and naturally dust mite resistant, and the resilient construction should hold its shape well over time.
- Waterproof Cover. A breathable waterproof cover that protects the foam from accidents without making the surface feel sweaty. It's removable and machine-washable, and you can simply wipe it clean for little spills.
Layer details from mattressnextday.co.uk product page, September 2026.
Who's it NOT for?
This is a children's mattress, so it's not the right pick for adults or teenagers who need a full-depth mattress: at 14cm it's slimmer than a standard adult foam mattress. It only comes in UK Single, and if your child prefers a softer, more cushioned feel, the firm surface may take some getting used to.
MattressNextDay Kids Waterproof Foam Mattress
Is the MattressNextDay kids waterproof mattress machine washable?
The mattress itself isn't washable, but the waterproof cover is. It zips off and goes in the washing machine, and for smaller spills you can simply wipe it clean without removing it.
How firm is the MattressNextDay kids foam mattress?
It's rated firm, with an orthopaedic-style EcoFoam® surface. That's generally a good thing for growing children who benefit from even, supportive sleep, although kids used to a softer feel may need a little time to adjust.
What sizes does the MattressNextDay kids waterproof mattress come in?
It's available in UK Single only, priced at £159. The mattress is 14cm deep, a sensible height for children's beds, bunk beds and cabin beds, though always check your bed frame's maximum mattress depth for bunks.
Does the MattressNextDay kids mattress have a guarantee?
Yes, it comes with a 5-year guarantee. It's also made in the UK by an NBF-approved manufacturer and meets the BS 7177 domestic flammability standard with Source 5 fire retardancy.
Is the MattressNextDay kids waterproof mattress good for allergies?
It should help. The EcoFoam® core is naturally dust mite resistant and the mattress is certified hypoallergenic, and being able to machine-wash the cover means you can keep the sleep surface genuinely clean, which matters for children with allergies.
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