Silentnight 7 Zone Memory Foam Mattress
Mattress
Silentnight 7 Zone Memory Foam Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
20
Layers
3
Layer Details
- Soft Touch Quilted Cover. A quilted fabric finish that gives a smooth, breathable sleep surface. It adds a touch of softness before you reach the foam beneath.
- Memory Foam. This comfort layer reacts to your body's contours, which means it cushions key pressure points like hips and shoulders. You get a personalised sleeping surface that adapts as you move.
- 7-Zone Support System. The base layer delivers enhanced support to different areas of the body. In practice, that helps keep your natural alignment from head to toe.
Layer details from mattressnextday.co.uk product page, September 2026.
- 90cm each for two sharing: Two people get 90cm of width apiece, which means neither of you sleeps on your edge to keep the peace.
- Distance plus foam for restless partners: Memory foam responds slowly and absorbs movement, and with 30cm more width than the UK king a fidgeting partner is doubly muffled.
- Space when children or pets pile in: At 6ft x 6ft 6in there is room for a wandering child or a large dog without anyone being pushed onto a cold sliver of mattress.
- Zoned support across the full width: The 7-zone support system runs under both sleepers, which means each of you gets targeted alignment even if you weigh quite different amounts.
- A 20cm all-foam slab is manageable: At 20cm deep with no springs, this super king can flex slightly around a landing turn where a rigid sprung mattress would jam.
This size suits you if...
You share the bed every night and one of you fidgets, turns or gets up in the small hours, so distance matters as much as the mattress itself. It also suits you if children or a large dog routinely join you before morning, or if your master bedroom is generous enough that a UK king would look a little lost against the wall.
Consider another size if...
Your bedroom is smaller than our suggested 3m x 2.9m minimum, or you'd struggle to walk round the bed. We'd recommend the UK king instead: it's the same length, 30cm narrower, and we suggest at least 2.7m x 2.9m for it.
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How much space do two people get on the Silentnight 7 Zone super king?
You get 90cm each for two people sharing, roughly a single bed's width per person. Combined with the memory foam layer, which absorbs movement rather than bouncing it across the bed, that makes this size a strong choice if one of you sleeps lightly and the other turns over a lot.
Should I buy the Silentnight 7 Zone in a UK king or super king?
The UK super king is 30cm wider than the UK king, and the two are the same length. If children or pets regularly end up in the bed, or one of you is restless, the extra width is what you'll notice. For the UK king we suggest a room of at least 2.7m x 2.9m; for the UK super king, 3m x 2.9m.
What are the dimensions of the Silentnight 7 Zone super king?
It measures 180 x 200cm, which is 6ft x 6ft 6in, with a depth of 20cm. That 180cm width matches two 90cm singles side by side, so it fills the same footprint as hotel-style paired beds. Standard UK super king fitted sheets will fit it.
Is the super king Silentnight 7 Zone good for families sharing with children?
It's one of the better all-foam options for it. With 90cm per adult there's still a workable share when a child climbs in, and the memory foam's slow response means their wriggling doesn't travel across to whoever is still asleep. The firm feel also holds up at the edges better than a softer foam would.
Where can I buy the Silentnight 7 Zone super king?
Availability at this size changes, so the most reliable answer is the live price table on this page, which is updated as retailers change their listings. Compare the retailers shown there rather than relying on a search, since not every stockist of this mattress carries the UK super king.