MattressNextDay Luxury Support Foam Mattress
Mattress
MattressNextDay Luxury Support Foam Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
20
Layers
2
Layer Details
- Knitted Cover. A soft knitted cover that's breathable, which means heat can escape rather than build up around you. It helps keep you at an even temperature through the night.
- Reflex Foam. Reflex foam conforms to the shape of your body, which means you get tailored support where you need it. It's designed to help your spinal alignment and posture, giving a comfortable, supportive night's sleep.
Layer details from mattressnextday.co.uk product page, September 2026.
- 90cm of width each: Two people sharing get 90cm each, which means a restless partner can turn over all night without you feeling a thing.
- Room for the whole household: When children pad in at night or the dog treats the bed as routine, this width means everyone still gets a genuine share.
- 15cm more each than a UK king: The UK super king is 30cm wider than the UK king at the same length, giving each sleeper 15cm more, a difference you notice every night.
- Firm-leaning support at full width: The reflex foam keeps its medium firm, supportive feel edge to edge, which means neither of you rolls towards the middle on a bed this wide.
- Fills a large master properly: In a period property or a big new build main bedroom, a UK king can look undersized; this footprint suits the room as well as the sleepers.
This size suits you if...
You share the bed every night and a UK double or even a UK king has started to feel cramped, children or pets regularly join you before morning, or your partner is genuinely restless and you've realised distance solves that better than any comfort layer could. It also makes sense if you have a large main bedroom that a smaller mattress would leave looking half furnished.
Consider another size if...
Your bedroom is smaller than the 3m x 2.9m we suggest, or you sleep alone and won't use the width. We'd recommend the UK king instead: 30cm narrower, the same length, and we suggest at least 2.7m x 2.9m for it.
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How much more space does the UK super king give than the UK king?
The UK super king is 30cm wider than the UK king, and the two are the same length. In practice that means 90cm each for two people sharing rather than 75cm, so 15cm more per person. It's the difference between sensing every turn your partner makes and barely registering them.
Is the MattressNextDay Luxury Support Foam Mattress in a UK super king a good choice for families?
If children wander in during the night, the 180cm width means a small visitor can squeeze in without pushing either adult to the edge. The medium firm reflex foam also limits how much movement travels across the surface, so a child settling on one side is less likely to wake the person on the other.
Will a UK super king overwhelm my bedroom?
It can in a modest room. We suggest allowing at least 3m x 2.9m so you can walk round the bed and open drawers comfortably. In a large master, though, the effect reverses: a UK king can look a little lost, while the UK super king fills the space in proportion.
Does the UK super king suit a restless partner better than sizing down?
Yes. No comfort layer fully hides a fidgety sleeper, but distance does, and 90cm each is the most any standard UK size offers. The foam build helps too, since there are no springs to transfer bounce, but at this size the width is doing most of the work.
Where can I compare prices for the super king version of this mattress?
Use the live comparison table on this page. Prices for the UK super king shown here are updated as retailers change them, so you're seeing current figures rather than a snapshot. Since prices vary by size, comparing on this page rather than the parent model page guarantees you're looking at super king pricing specifically.