MattressNextDay Value Memory Foam King Size Mattress
The MattressNextDay Value Memory Foam Mattress is a simple, budget-friendly foam mattress with a 2cm memory foam layer over an EcoFoam® base made from 100% recycled foam.
- Memory foam cushions hips & shoulders
- Hypoallergenic & dust mite resistant
- 5-year guarantee
£239
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MattressNextDay Value Memory Foam Mattress
More available sizes
Mattress details
Mattress
MattressNextDay Value Memory Foam Mattress
Size
Firmness
Medium Firm
Construction
Foam
Memory Foam
Depth (cm)
15
Layers
3
Layer Details
Knitted Cover
A removable, washable knitted cover designed with breathability in mind, which means you can keep it fresh without replacing a protector every time. It's soft to the touch as well.
Memory Foam
A 2cm layer of memory foam that moulds to your body, giving orthopaedic support and cushioning where you press into the mattress. It's a thin layer, so expect a gentle contour rather than a deep sink-in feel.
EcoFoam®
A 13cm base made from 100% recycled and re-engineered foam, which means the supportive core of the mattress is resilient and durable while keeping waste out of landfill. It also has natural dust mite resistance, helpful for allergy-prone sleepers.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- Proper space for two: At 75cm each for two people sharing, you can both turn over without negotiating, which matters most on a mattress this simple.
- Less partner disturbance: Foam transfers less motion than open springs, so a partner who gets up hours before you is slightly less likely to wake you.
- Extra length for taller sleepers: At 200cm, the UK king is 10cm longer than the UK double, a welcome difference for anyone approaching six foot.
- A cheap route to a big bed: Sizing up usually costs serious money; here the king keeps the low-cost, medium firm formula in the size couples actually want.
- Washable cover at full width: The removable knitted cover means a 150cm-wide mattress you can actually keep fresh, useful if the dog treats the bed as its own.
This size suits you if...
You share the bed every night and a double has started to feel cramped, you or your partner keep different hours and want enough width that early starts go unnoticed, or one of you is tall enough that the extra length at 200cm settles the argument. It also suits a guest room that hosts couples, where a slim, low-cost mattress is fine for occasional stays.
Consider another size if...
Your bedroom falls short of the 2.7m x 2.9m we suggest for a UK king, or you sleep alone. In either case we'd recommend the UK double instead; allow at least 2.6m x 2.8m for that size.
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FAQ's
Is the MattressNextDay Value Memory Foam Mattress in a UK king good for couples?
For the price, yes, with conditions. The 75cm each for two people sharing is generous, and foam dampens movement when one of you gets up early. The 2cm memory foam layer over a 15cm profile is thin, though, so heavier couples may press through to the firmer base. For lighter sleepers or a guest room it does the job.
How much bigger is the UK king than the UK double for this mattress?
The UK king is 15cm wider and 10cm longer than the UK double. Shared between two, the UK double gives 67.5cm each, so the UK king gives 7.5cm more each. That sounds modest on paper, but it's the difference between brushing elbows and settling into your own side.
What room size do I need for this mattress in a UK king?
We suggest at least 2.7m x 2.9m so you can walk round the bed and open drawers comfortably. In a new build master bedroom that can be tighter than it sounds once fitted wardrobes go in, so measure the usable floor rather than the room on the plan.
Is the king size long enough for someone over six foot?
At 200cm (5ft x 6ft 6in overall), the UK king gives a 6ft sleeper roomy clearance, and it's 10cm longer than the UK double. If length is your main reason for upgrading, the king delivers it without needing the floor space of a UK super king.
Where can I buy this mattress in a UK king?
Compare the retailers listed on this page. The prices shown here are live and updated as retailers change them, so check the table rather than relying on a figure you saw elsewhere, especially around sale periods when budget mattresses move around in price.