Sealy Posturepedic Elevate Ultra Arden Memory King Size Mattress
The Sealy Posturepedic Elevate Ultra Arden is a 30cm deep hybrid that pairs memory foam with Sealy's AlignSupport coil springs, which means you get the cushioned, cradling feel of foam with more responsive support underneath than an all-foam design.
- Memory foam without the sunken feel
- Cover draws heat & moisture away
- Allergy UK approved
£1,328
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Sealy Posturepedic Elevate Ultra Arden Memory Mattress
More available sizes
Mattress details
Mattress
Sealy Posturepedic Elevate Ultra Arden Memory Mattress
Size
Firmness
Medium Firm
Construction
Memory Foam
Depth (cm)
30
Layers
5
Layer Details
Knitted cover
A soft knitted cover treated with SmarTex fibres, which draw heat and moisture away while regulating body temperature. It also carries a ProShield treatment to fight allergens, useful if dust or dander tends to set you off.
InfiniLux foam
A high density foam layer designed for long-lasting comfort, which means it should resist softening and sagging over time. It cushions your body while staying responsive rather than letting you sink.
MemorySense ComfortCore
A memory foam layer that gives extra support around the curve of your back. In practice, this is where the pressure relief for your back and hips comes from.
Reflex foam
A soft, flexible foam that supports spinal alignment. It acts as a transition between the memory foam above and the springs below, so you feel supported rather than perched.
AlignSupport coil springs
Sealy's Posturepedic spring system senses and responds to your body weight to keep the spine aligned. The springs are twice tempered, which means they're heat-treated to hold their responsiveness for longer.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- Proper space for two: At 75cm each for two people sharing, you can both settle onto the memory foam without negotiating over the middle of the bed.
- Length for taller sleepers: The UK king is 10cm longer than the UK Double at 200cm, so anyone approaching 6ft gets their feet on the mattress rather than off the end.
- Room for different schedules: If one of you leaves for work hours earlier, the extra width gives the responsive AlignSupport springs less distance to carry movement across to a sleeping partner.
- Firm support across a wider surface: The medium firm tension and twice tempered springs keep their supportive feel edge to edge, useful when two sleepers of different weights share the bed.
- Cooler sharing: Two bodies generate more warmth than one, and the SmarTex cover draws heat and moisture away, which matters more at this size than in a single.
This size suits you if...
You share the bed every night and a double has started to feel cramped, you or your partner is tall enough that the 10cm of extra length over a UK double makes a real difference, or your sleep schedules don't match and you want enough width that one person getting up disturbs the other less. Allow at least 2.7m x 2.9m of floor space.
Consider another size if...
Your room falls short of the 2.7m x 2.9m we suggest for a UK king, or you're a light sleeper bothered by the motion transfer some owners mention. For the first, we'd recommend the UK double; for the second, the UK super king, allowing at least 3m x 2.9m.
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FAQ's
Is the Sealy Arden in a UK king good for couples?
For most couples, yes. The 150cm width gives you 75cm each, and the medium firm tension supports two different body weights well. One caution: some owners report motion transfer between partners, so very light sleepers may prefer the UK super king, where the extra 30cm of width puts more distance between you.
Is a UK king Sealy Arden long enough for someone over 6ft?
It should be. At 200cm long, the UK king gives you 10cm more length than the UK double, which is often the difference between feet on the mattress and feet hanging off it. If you're well over 6ft, sizing up to the UK super king won't help here, as the two sizes are the same length.
What room size do I need for the Sealy Arden UK king?
We suggest at least 2.7m x 2.9m for a UK king, and that's our guidance rather than Sealy's. New build master bedrooms can shrink quickly once fitted wardrobes go in, so measure the clear floor space rather than the room itself. If you're under that minimum, the UK double needs at least 2.6m x 2.8m.
Should I choose the Sealy Arden in a UK king or a UK double?
The UK king is 15cm wider and 10cm longer than the UK double, a difference you feel every night rather than a spec sheet detail. If you share the bed, or a dog routinely claims a corner of it, the king is the better long-term buy provided your room allows at least 2.7m x 2.9m.
Where can I buy the Sealy Arden in a UK king?
Compare the retailers listed on this page. The prices shown here are live and updated as retailers change them, so it's worth checking back before you commit, as king size mattresses are discounted fairly often in seasonal sales.