Sealy Posturepedic Elevate Ultra Arden Memory Mattress
Mattress
Sealy Posturepedic Elevate Ultra Arden Memory Mattress
Size
Firmness
Medium Firm
Construction
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.
- 90cm of width each: Two sharers each get 90cm, which means a partner turning over, or a child wandering in at 3am, doesn't have to mean anyone loses their patch.
- Distance helps with disturbance: Some owners report motion transfer on this mattress, so the extra width matters here: the further apart you sleep, the less of a partner's movement reaches you.
- Support that scales with sharers: The AlignSupport coil springs respond to body weight individually, so a lighter sleeper and a heavier one can share 180cm without one dictating the feel for both.
- Cooler across a bigger surface: The SmarTex knitted cover draws heat and moisture away, useful when two adults, and occasionally a dog, are warming the same bed.
- Fills a large master properly: In a period property or a generous new build master, a UK king can look undersized against the wall; the 6ft x 6ft 6in footprint sits in proportion.
- Allergy protection for the whole household: The ProShield treatment and Allergy UK approval matter more when children and pets treat your bed as shared territory.
This size suits you if...
You share every night and want the most sleeping space a standard UK size offers, your children or a large dog regularly end up in the bed and you'd rather everyone kept a fair share, or a restless partner wakes you and you've realised distance solves what no comfort layer can. Your room should measure at least 3m x 2.9m, and closer to 3.5m x 3.2m to feel right.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest, or you'd rarely use the extra width. We'd recommend the UK king instead: it's 30cm narrower, the same length, and needs at least 2.7m x 2.9m.
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What room size do I need for the Sealy Arden in a UK super king?
We suggest a minimum of 3m x 2.9m, though around 3.5m x 3.2m feels comfortable, leaving space to walk round the bed and open wardrobe doors. Measure the door swing and any landing turns before ordering too, since a 180 x 200cm mattress is awkward on tight stairs. In a loft conversion, the ceiling slope may decide which wall the bed takes.
Is the Sealy Arden super king good for restless couples?
Largely, yes, though with one caveat. Across owner reviews, some people report motion transfer between partners on this mattress, so the memory foam alone won't fully absorb a fidgety sleeper. The super king's 90cm per person does most of the work instead: at that distance, movement on the other side of the bed is much easier to sleep through.
Should I choose the Sealy Arden in a UK king or UK super king?
The UK super king is 30cm wider than the UK king and the two are the same length, so the decision is about width and room size. If children or pets join you regularly, or a partner's movement wakes you, the extra 30cm is genuinely useful. If your room is under 3m x 2.9m, the UK king suits you better, needing at least 2.7m x 2.9m.
How much space does each person get on a super king Arden?
90cm each for two people sharing, the same width as a UK single apiece. In practice that means you can both stretch out, and when a child climbs in during the night there's usually still enough mattress for everyone. The AlignSupport springs respond to each person's weight, so different builds sharing the bed each get appropriate support.
Is the Sealy Arden super king suitable for families who co-sleep?
It's one of the better choices for it. The 180 x 200cm footprint is the largest stocked as standard in the UK, so young children or a large dog can join without pushing anyone to the edge. The Allergy UK approved ProShield treatment helps if pet dander is a concern. To compare stockists, use the live prices shown on this page.