Sealy PostureLux Wilton Super King Mattress
The Sealy PostureLux Wilton Mattress combines a latex comfort layer with a firm pocket spring core, which means you get quick pressure relief on top of the firm, supportive feel you'd expect.
- Firm feel for back sleepers
- Latex layer eases pressure
- Larger usable sleep surface
£1,799
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Sealy PostureLux Wilton Mattress
More available sizes
Mattress details
Mattress
Sealy PostureLux Wilton Mattress
Size
Firmness
Firm
Construction
Foam
Latex
Pocket Spring
Depth (cm)
29
Layers
2
Layer Details
Latex comfort layer
A latex layer that moves with you, which means instant pressure relief while the firm feel stays underneath.
Sealy firm foam layer
A double layer of Sealy's firm premium foam that completes the comfort stack, which means a steady, supportive feel above the springs.
Layer details from crushedvelvetbedstore.co.uk product page, November 2026.
Key benefits
- Distance from a restless partner: With 90cm each, a partner who turns all night lies a full UK single's width away, which means distance does what no comfort layer can.
- Space when children or pets climb in: When a child or the dog arrives in the small hours, the 180cm width means nobody gets squeezed to the side, and the flat, firm surface stays level beneath everyone.
- More of the width is usable: Sealy's UniKey edge system gives a larger usable sleep surface, which means you can lie nearer the side and still use the full width you're paying for.
- Wider than the UK king, same length: It keeps the UK king's 200cm length and adds 30cm of width, so taller sleepers gain no legroom, but each of you gets 15cm more space side to side.
- In proportion with a large room: In a period house or a generous master bedroom, a UK super king fills a wide wall properly, where a UK king can look slightly lost.
This size suits you if...
You share with a partner who tosses and turns, or most mornings find a child or dog between you, and your bedroom comfortably clears our suggested 3m x 2.9m, ideally closer to 3.5m x 3.2m so you can walk round both sides.
Consider another size if...
Your bedroom falls short of 3m x 2.9m, or a sloping loft ceiling leaves no wall long enough. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
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FAQ's
Is the Sealy PostureLux Wilton UK super king big enough for two adults and a child?
Two adults get 90cm each, so a small child in the middle takes a little from both sides rather than all from one. Bear in mind the Firm rating: lighter side sleepers, children included, may find it hard at the shoulders and hips. For a regular three in a bed, the UK super king leaves everyone a fair share.
What size bedroom do I need for a Sealy PostureLux Wilton UK super king?
We suggest at least 3m x 2.9m, with around 3.5m x 3.2m feeling comfortable. In a loft conversion, the slope usually decides which wall the bed goes against, so measure there first. Then check the stairs, landing turns and door swing, and compare the retailers listed on this page.
How much wider is the UK super king than the UK king?
The UK super king is 30cm wider than the UK king, and the two are the same 200cm length. Shared between two people, that works out at 15cm more each: 90cm in the UK super king against 75cm in the UK king. You gain width only, so taller sleepers won't get extra legroom.
Does a super king help if my partner is a restless sleeper?
Yes. Distance is the most dependable fix for a restless sleeper, and this size gives each of you 90cm. The firm feel and latex layer are the same in every size of the Sealy PostureLux Wilton, so the difference here is how far apart you can lie, helped by an edge system that keeps more of the width usable.
What bedding fits the Sealy PostureLux Wilton in a UK super king?
You'll need super king fitted sheets and a 260 x 220cm duvet. The mattress is 29cm deep, so choose fitted sheets with pockets deep enough to tuck under properly. If you're moving up from a smaller bed, plan for new bedding as a separate cost alongside the mattress.