Silentnight 3 Zone Memory Foam Mattress
Mattress
Silentnight 3 Zone Memory Foam Mattress
Size
Firmness
Construction
Depth (cm)
18
Layers
2
Layer Details
- Soft Knitted Sleep Surface. A soft, breathable knitted cover that adds a touch of comfort at the surface. It takes a little of the edge off the firm feel beneath.
- Memory Foam. Body-moulding memory foam that responds to your shape, which means pressure points at the hips and shoulders get some relief. Expect a contouring, cradled feel rather than bounce.
Layer details from mattressnextday.co.uk product page, September 2026.
- 90cm of width each: Two people sharing get 90cm apiece, which means you can both turn over freely without ever touching in the night.
- Memory foam limits motion transfer: All-foam construction absorbs movement rather than bouncing it across the bed, and at this width a restless partner barely registers.
- Space for night-time visitors: Children who wander in at 3am, or a large dog who considers the bed theirs, can squeeze in without pushing anyone to the edge.
- Firm support across the full 180cm: The firm feel stays consistent edge to edge, so neither sleeper rolls towards the middle on this wide a surface.
- A slimmer profile at 18cm: The 18cm depth keeps a big mattress from towering over the frame, and makes standard super king fitted sheets easy to tuck.
This size suits you if...
You share the bed every night and want the most sleeping space a standard UK size offers, your partner is genuinely restless and distance matters more to you than any comfort layer, or children and pets regularly join you and everyone still needs their share of the mattress. A firm feel suits you both, and your room comfortably clears 3m x 2.9m.
Consider another size if...
Your bedroom is under our suggested 3m x 2.9m minimum, or the bed would dominate the room. We'd recommend the UK king instead: it's 30cm narrower, the same length, and needs at least 2.7m x 2.9m.
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How much space does each person get on the super king Silentnight 3 Zone?
Two people sharing get 90cm of width each on the UK super king, and the memory foam keeps each sleeper's movement on their own side. Because the foam contours rather than bounces, one of you shifting position sends very little disturbance across, which is the whole point of buying this much width.
Will a super king Silentnight 3 Zone fit in my bedroom?
The mattress measures 180 x 200cm, or 6ft x 6ft 6in. We suggest a room of at least 3m x 2.9m, and that's a genuine minimum: you still need clearance for door swing, wardrobe doors and walking round the bed. In a loft conversion, check the ceiling slope leaves headroom on both sides too.
Is the super king Silentnight 3 Zone good for restless couples?
It's a strong fit for exactly that. Memory foam absorbs movement better than sprung mattresses, and at 180cm wide there's simply more distance between you. The firm feel also helps here, since neither of you sinks into a dip that pulls the other across the bed.
How much bigger is the super king than the king in this mattress?
The UK super king is 30cm wider than the UK king, and the two are the same length. In practice that extra width is what makes room for a child or dog joining you without anyone hanging off the edge. The trade-off is the larger room it needs: at least 3m x 2.9m against 2.7m x 2.9m for the UK king.
Is the super king Silentnight 3 Zone easy to get upstairs?
Easier than many. At 18cm deep it's slimmer than most super kings, which helps on tight landing turns, though 180 x 200cm of foam is still an awkward, floppy carry for two people. Measure your stairwell and any turns before ordering, since Silentnight doesn't publish a boxed size for delivery.