Last seen for £459 at Silentnight on 30th September 2026
Silentnight Comfort Miracoil Essentials Super King Mattress
The Silentnight Comfort Miracoil Essentials is a firm mattress at the affordable end of Silentnight's range, available in five UK sizes from Single to Super King.
- Firm support with even weight spread
- Memory layer softens pressure points
- 60-night trial & 5-year guarantee
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
More available sizes
Last seen for £239 at Silentnight on 30th September 2026
Last seen for £369 at Silentnight on 30th September 2026
Last seen for £459 at Silentnight on 30th September 2026
Last seen for £299 at Silentnight on 30th September 2026
Last seen for £309 at Silentnight on 30th September 2026
Mattress details
Mattress
Silentnight Comfort Miracoil Essentials Mattress
Size
Firmness
Firm
Construction
Latex
Depth (cm)
21
Layers
5
Layer Details
Cover
Luxury soft micro quilt cover
Top Layer
Miracoil zoned spring system
Key benefits
- 90cm of width each: Two people sharing get 90cm apiece, which means a restless partner can turn over without you feeling much of it.
- Zoned springs across the full 180cm: The Miracoil spring system is designed for even weight distribution, so neither of you rolls towards the middle even on a bed this wide.
- Room for night-time visitors: When a child pads in at 3am, or the dog treats the bed as routine, a 6ft width means everyone still gets a workable share.
- A slimmer 21cm profile: On a footprint this large, the shallower build keeps the bed from dominating the room visually, and standard super king fitted sheets go on easily.
- Firm support that suits sharing: A firm surface with a light memory layer stays stable at the edges, useful when two adults and occasional extras spread across it.
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 a UK king has started to feel crowded. Your room should comfortably clear 3m x 2.9m, with space to walk around both sides.
Consider another size if...
Your bedroom is under our suggested minimum of 3m x 2.9m, or you mostly sleep alone. We'd recommend the UK king instead: it is 30cm narrower and the same length, and needs at least 2.7m x 2.9m.
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FAQ's
Will a super king version of this mattress 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, which allows walking space on both sides and room for doors and drawers to open. Measure door swing and any landing turns too: a one-piece super king is the size most likely to struggle on stairs.
Is the Silentnight Comfort Miracoil Essentials super king good for restless couples?
It is a sensible match. With 90cm of width each, most movement simply happens too far away to disturb you, and the zoned spring unit is designed to distribute weight evenly, so you are less likely to roll together. Sheer distance does more for a light sleeper than any comfort layer, and this size offers the most of it.
How much wider 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 at 200cm. That extra width is what turns a shared bed from adequate into genuinely spacious, particularly if children or pets join you. The firm feel and 21cm depth are identical in both sizes.
Can children share this size with us at night?
More comfortably than any other standard UK size. At 180cm wide there is usually still a fair share for everyone when a child climbs in, and the firm, evenly supportive spring unit holds its shape rather than dipping towards the heaviest sleeper. It will never feel roomy with four in it, but it copes.
What bedding do I need for this mattress in a super king?
Super king fitted sheets sized for 180 x 200cm, and a 260 x 220cm duvet. The slimmer 21cm depth of this mattress is a quiet advantage here: standard-depth super king sheets fit without straining, so you are not forced into pricier extra-deep bedding. Budget a little more than for a UK king, as super king linen costs more across the board.