Sealy PosturePedic Denison Combination King Size Mattress
The Sealy PosturePedic Denison Combination Mattress has a very firm feel and Eco ComfortCore foam for hip and lower back support, which means you rest on top of the mattress rather than sinking into it.
- Supports hips & lower back
- Cool-to-the-touch surface
- Cover endorsed by Allergy UK
£1,799
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Sealy PosturePedic Denison Combination Mattress
More available sizes
Mattress details
Mattress
Sealy PosturePedic Denison Combination Mattress
Size
Firmness
Extra Firm
Construction
Foam
Depth (cm)
28
Layers
Layer Details
Key benefits
- Room to turn over: Each of you gets 75cm of width, which means rolling onto your back or shifting position is less likely to nudge your partner awake.
- Length for a tall partner: At 200cm long, the UK king adds 10cm over the UK double, so a taller sleeper's feet stay on the mattress rather than resting on the edge.
- Easier on different schedules: If one of you is up hours before the other, the extra width puts a little more distance between the early riser and the person still sleeping.
- Supportive sides for getting up: Sealy's UniCased edge support is designed to keep the sides supportive, which helps if you're recovering from an injury and sit on the edge before standing.
- Fits more bedrooms than a super king: We suggest allowing at least 2.7m x 2.9m for the UK king, compared with 3m x 2.9m for the UK super king.
This size suits you if...
You share the bed every night and keep bumping elbows on a UK double, one of you is tall enough that a 190cm mattress feels short, or you both want an extra firm surface for back sleeping.
Consider another size if...
Your bedroom falls short of our suggested 2.7m x 2.9m once wardrobes and bedside tables are in. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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FAQ's
How much space does each person get on a Sealy Denison UK king?
Two people sharing the UK king get 75cm each. That is 7.5cm more each than on the UK double, which feels like a small number on paper but is noticeable when you turn over at night. The UK super king gives 90cm each, so 15cm more per person than the UK king.
Is the Sealy Denison UK king long enough for a tall person?
The UK king is 200cm long, 10cm longer than the UK double and the UK single, which are both 190cm. If one of you is tall, that extra length is often the real reason to upgrade. The UK super king is the same length as the UK king, so sizing up adds width only.
What size bedroom do I need for a Sealy Denison king size mattress?
We suggest at least 2.7m x 2.9m for the UK king, and around 3.2m x 3.2m if you want comfortable space to walk round both sides. New build master bedrooms can feel smaller once fitted wardrobes are in, so measure the free floor space rather than the whole room.
Should a couple choose the Sealy Denison in a UK king or UK super king?
The UK super king gives 90cm each against 75cm on the UK king, which helps if a dog regularly joins you or one of you sprawls. It needs more room, though: we suggest at least 3m x 2.9m for the UK super king, compared with 2.7m x 2.9m for the UK king.
What bedding fits a Sealy Denison UK king?
Standard UK king sheets fit, along with a 230 x 220cm king duvet. The Denison is 28cm deep, so check that your fitted sheet's pockets are deep enough for that before buying, as shallower sheets can pull off at the corners.