Sealy Elevate Hagen King Size Mattress
The Sealy Elevate Hagen Mattress pairs a twice-tempered AlignSupport Coil system with a double layer of extra firm foam, which means you get a flat, unyielding surface with deep-down support.
- Extra-firm feel for back sleepers
- Cool-to-touch cover
- Allergy UK endorsed allergen protection
£1,599
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Sealy Elevate Hagen Mattress
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Mattress details
Mattress
Sealy Elevate Hagen Mattress
Size
Firmness
Extra Firm
Construction
Foam
Memory Foam
Depth (cm)
28
Layers
3
Layer Details
AlignSupport Coil system
A patented, twice-tempered coil with a UniCased edge. It gives deep-down support and a supportive edge, so the mattress stays stable when you sit or sleep near the side.
MemorySense ComfortCore
A comfort core positioned to support the hips and lower back for pressure relief. You get a little cushioning where your body presses down most.
Extra firm foam
A double layer of extra firm foam sits alongside the ComfortCore. It keeps the surface flat and firm, with very little sink.
Layer details from crushedvelvetbedstore.co.uk product page, November 2026.
Key benefits
- More room each than a UK double: You each get 75cm of width, which is 7.5cm more per person than a UK double and enough to stop elbows meeting halfway through the night.
- Length for a partner over six foot: At 200cm, or 6ft 6in, the UK king is 10cm longer than a UK double, so taller sleepers are less likely to have their feet hanging over the end.
- Space between different schedules: If one of you is up hours before the other, the extra width gives the early riser a little more room to get out without crossing your side.
- A supported edge for getting up: Sealy fits a UniCased edge to the coil system, which means the side stays stable when you sit on it, useful if you are recovering from injury or surgery.
- A flat surface across the full width: Sealy uses a double layer of extra firm foam, so both halves of the UK king feel equally flat rather than dipping towards the middle.
- Standard king bedding fits: A 230 x 220cm king duvet suits the UK king, so you won't need to hunt for unusual sheet or duvet sizes.
This size suits you if...
You share the bed every night and keep waking when your partner turns over or gets up early, or one of you is close to six foot and has run out of length on a UK double. You should also both like a flat, extra firm surface with very little give.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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FAQ's
Is the Sealy Hagen UK king long enough for someone over six foot?
The UK king is 200cm long, or 6ft 6in, which is 10cm longer than a UK double. If one of you is around six foot or taller, that extra length is often the more useful part of the upgrade, and it means your feet are less likely to reach the end.
How much space do you each get on a UK king mattress for two?
A UK king gives you 75cm each when two of you share. A UK double gives 67.5cm each, so the UK king adds 7.5cm per person. That is enough to notice if you sleep a little restlessly or keep different hours, although it is still narrower than a UK super king.
What size bedroom do I need for a Sealy Hagen king size mattress?
We suggest allowing at least 2.7m x 2.9m for a UK king, and 3.2m x 3.2m feels comfortable. New build master bedrooms can feel tighter once built-in wardrobes go in, so measure the floor space that is actually left before you choose a size.
Should couples choose the UK king or UK super king Sealy Hagen?
The UK super king gives 90cm each, which is 15cm more per person than the UK king, and both are the same length. If you often disturb each other at night and your room is at least 3m x 2.9m, the UK super king is the better choice. Otherwise the UK king covers most couples.
What duvet fits a Sealy Hagen UK king?
A standard king duvet measuring 230 x 220cm fits the UK king, along with ordinary king size sheets. The mattress is 28cm deep, so check that any fitted sheet you buy has deep enough pockets to tuck in properly.