Sealy PosturePedic Denison Combination Super King 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
£2,199
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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
- Distance from a restless partner: With 90cm each, a partner who kicks or turns all night is further away from you, and that physical gap helps where softer comfort layers can't.
- Space when the bed fills up: If a child climbs in at 3am or a large dog settles at the foot as routine, the full 180cm width means the adults still keep a usable share.
- 15cm more each than a UK king: Moving up from the UK king adds 30cm of width and 15cm per sleeper, while the 200cm length stays the same, so taller sleepers lose nothing.
- Edges designed to stay supportive: Sealy's UniCased edge support system is designed to keep the sides firm, which helps when a wandering child pushes one of you towards the edge.
- In proportion with a big room: In a period property or a generous master bedroom, a UK king can look a little lost against the walls, and the UK super king fills the space more naturally.
This size suits you if...
You share the bed with a restless partner, or with children and pets who tend to arrive in the night, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom falls short of 3m x 2.9m, or your stairs and landing are too tight for a 180cm wide mattress. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
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FAQ's
What size bedroom do I need for a Sealy Denison UK super king?
We suggest at least 3m x 2.9m, although around 3.5m x 3.2m feels more comfortable once bedside tables and wardrobe doors are in play. In a loft conversion, the sloping ceiling usually decides which wall the bed goes against, so measure the full-height floor area rather than the whole room.
Is a Sealy Denison UK super king big enough for two adults and a child?
For occasional night visits, yes. Two adults get 90cm each before anyone joins, so a small child can squeeze in for a few hours. The extra firm surface stays flat, which means nobody rolls towards the middle. If a child sleeps in with you every night, though, expect it to feel tight, because three people are sharing a width designed for two.
Sealy Denison super king or king: which is better for couples?
The UK super king is 30cm wider than the UK king, giving 15cm more each, and both are 200cm long. If your partner's movement wakes you, that extra width is the reason to size up. If your room is closer to 2.7m x 2.9m, the UK king is the sensible choice.
What bedding fits a Sealy Denison UK super king?
You'll need super king sheets and a 260 x 220cm duvet. The mattress is 28cm deep, so check the pocket depth on any fitted sheet before buying, as shallower ones can ping off the corners. Bedding at this size costs more than king sets, so budget for it alongside the mattress.
Will a Sealy Denison UK super king fit up my stairs?
It measures 180 x 200cm, or 6ft x 6ft 6in, and the width is what catches people out on tight landing turns and doors that open inwards. Measure the narrowest turn and the bedroom doorway with the door open, then compare the retailers listed on this page.