Silentnight Comfort Miracoil Memory Super King Mattress
The Silentnight Comfort Miracoil Memory Mattress is a hybrid, which means it pairs a spring system with memory foam so you get support underneath and a softer, contouring feel on top.
- Body-moulding memory foam comfort
- Zoned Miracoil spring support
- Fits most UK bed frames
£620
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Silentnight Comfort Miracoil Memory Mattress
More available sizes
Last seen for £389 at Silentnight on 23rd June 2026
Mattress details
Mattress
Silentnight Comfort Miracoil Memory Mattress
Size
Firmness
Firm
Construction
Hybrid
Memory Foam
Latex
Depth (cm)
Layers
Layer Details
Cover
Luxurious soft knit cover
Top Layer
Body moulding memory foam
Layer 2
Miracoil zoned spring system
Key benefits
- 90cm each when sharing: Two adults get 90cm of width apiece, which means a partner who turns over a lot happens at a distance rather than against your back.
- Space that absorbs the whole household: When children pad in at 3am or the dog treats the bed as routine, 180cm of width means everyone still gets a share.
- Memory foam works better with room to spread: The body-moulding memory foam layer contours to you, and at this width you can move to a fresh spot without meeting anyone else's dip.
- Zoned springs across the full width: The Miracoil zoned spring system supports both sleepers independently, so a heavier partner sinking in on their side is felt less on yours.
- Same length as a UK king: The UK super king is 30cm wider than the UK king but the same length, so if a king fits your room lengthways, only width needs checking.
This size suits you if...
You share the bed every night and a UK king has started to feel crowded, you have young children or pets who join you regularly and you want everyone to fit without anyone clinging to an edge, or your master bedroom is large enough that a smaller mattress would look lost. Allow at least 3m x 2.9m of floor space before committing.
Consider another size if...
Your bedroom measures less than the 3m x 2.9m we suggest, or you'd be filling the room with mattress and losing walking space. We'd recommend the UK king instead: it's 30cm narrower, the same length, and needs around 2.7m x 2.9m.
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FAQ's
How much space do two people get on the super king Silentnight Comfort Miracoil Memory?
90cm each for two people sharing, across the full 180cm width. That's enough that a restless partner's movement mostly stays on their side, helped by the Miracoil zoned spring system supporting each sleeper independently. If children or pets join you at night, there's still workable room for everyone.
What room size do I need for the Silentnight Comfort Miracoil Memory in a UK super king?
We suggest at least 3m x 2.9m, and around 3.5m x 3.2m feels more comfortable, leaving space to walk round the bed and open drawers. This is our own guidance rather than Silentnight's. Measure door swing and wardrobe access too, because at 180 x 200cm this mattress dominates a modest room.
Should I get this mattress in a UK king or a UK super king?
The UK super king is 30cm wider than the UK king and exactly the same length, so it comes down to width and room size. If two of you share with children or pets in the mix, and your room clears 3m x 2.9m, take the super king. In a smaller room the UK king is the sensible pick.
Is the UK super king version worth it for a restless partner?
Yes, and at this size the width does more than any comfort layer could. With 90cm each, most tossing and turning simply happens too far away to wake you, and the zoned Miracoil springs reduce how much movement carries across. The memory foam top adds contouring, but distance is the real fix.
Will the super king Silentnight Comfort Miracoil Memory get up my stairs?
At 180 x 200cm it's the trickiest size in this range to move. Silentnight doesn't publish handling guidance for this model, so measure your stairwell, landing turns and bedroom door before ordering, especially in a period property or loft conversion where turns are tight. Check the retailer's delivery access policy too.