Sealy PostureLux Wilton King Size 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
£1,599
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
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
- More room each: Sharing a UK king gives you 75cm each, which means 7.5cm more personal space than a UK double and fewer nudges when your partner turns over.
- Length for taller sleepers: At 200cm, or 6ft 6in, the UK king is 10cm longer than a UK double, so a partner over six foot can stretch out without feet reaching the end.
- More of the width is usable: Sealy's UniKey edge system is designed to give a larger usable sleep surface, which means more of the 150cm width is space you can actually lie on.
- Distance on different schedules: If one of you gets up hours before the other, the extra width puts a little more distance between you as they climb out in the dark.
- Fits a main bedroom: We suggest at least 2.7m x 2.9m for a UK king, compared with 3m x 2.9m for the UK super king, which helps in a new build main bedroom with fitted wardrobes.
This size suits you if...
You share the bed every night and have started to feel cramped on a UK double, one of you is tall enough that a 190cm mattress leaves feet near the edge, or you keep different hours and want a little more space between you on a firm, supportive mattress.
Consider another size if...
Your bedroom is under our suggested 2.7m x 2.9m once wardrobes and drawers are in. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
How much space does each person get on a UK king Sealy PostureLux Wilton?
Two people sharing a UK king get 75cm each. That is 7.5cm more each than the UK double of the same mattress, which gives 67.5cm each. On a firm mattress like this one, where you tend to lie on top rather than sink in, that extra width makes it easier to settle without touching.
Is the Sealy PostureLux Wilton UK king long enough for someone over 6ft?
The UK king is 200cm long, or 6ft 6in, which is 10cm longer than the UK double and the same length as the UK super king. If one partner is over six foot, this extra length is often the real reason to size up, more than the width.
What size bedroom do I need for a UK king Sealy PostureLux Wilton?
We suggest allowing at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m feeling comfortable. In a new build main bedroom, measure after fitted wardrobes are in, as they often take more floor than the plans suggest.
Should we get the Sealy PostureLux Wilton in a UK king or UK super king?
The UK king is 30cm narrower than the UK super king but the same length, giving 75cm each rather than 90cm. If you want more room without the larger footprint, the UK king fits a smaller room. For the UK super king, we suggest at least 3m x 2.9m.
What bedding fits a king size Sealy PostureLux Wilton mattress?
Standard UK king sheets fit the 150 x 200cm surface, and a 230 x 220cm king duvet covers two people comfortably. The mattress is 29cm deep, so check that your fitted sheet's pockets are deep enough to tuck under the edges securely.