Sealy Posturepedic Elevate Ultra Arden Memory 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
£984
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The Sealy Posturepedic Elevate Ultra Arden is described as medium by Sealy, though retailer listings give it as medium firm, so expect a supportive rather than plush feel. It comes in four sizes, from single to super king. It's Approved by Allergy UK and handcrafted in the UK, and comes with a 7 year guarantee. It sits at the pricier end, but the layered construction and certifications go some way to justifying that.
Mattress specifications
Firmness
Medium Firm
Type
Memory Foam
Depth (cm)
30
Number of Layers
5
Trial Period (nights)
100
Warranty (years)
7
Price Range
£984 to £1,708
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
BS 7177, Allergy UK
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
This mattress suits sleepers who want memory foam comfort without the sunken, slow-moving feel some all-foam beds have. The MemorySense ComfortCore layer targets support around the back and hips, while the twice tempered coil springs respond to your body weight to keep the spine aligned. If you sleep warm, the knitted cover uses SmarTex fibres to draw heat and moisture away, a genuine help since memory foam has a reputation for trapping warmth. Allergy sufferers get a ProShield treatment and Allergy UK approval. It's also been approved by the Good Housekeeping Institute for 2023. It's a considered purchase, but the 7 year guarantee offers reasonable long-term reassurance.
Key features & 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.
Best suited for?
Allergy sufferers
Approved by Allergy UK and fitted with a ProShield treatment in the knitted cover, this mattress is a sensible pick if dust or dander tends to bother you.
Warm sleepers
The knitted cover uses SmarTex fibres to draw heat and moisture away, which helps offset the way memory foam can trap warmth overnight.
Back sleepers
A MemorySense ComfortCore memory foam layer adds support around the curve of your back, while the coil springs respond to your weight to keep the spine aligned.
Combination sleepers
InfiniLux foam cushions your body while staying responsive rather than letting you sink, so changing position during the night should feel easy.
If you're on a tight budget, the starting price will feel steep. Sleepers who share a bed and wake easily should note that some owners report motion transfer between partners. And if you prefer a genuinely soft, sink-in feel, this medium tension may read as firmer than you'd like; one reviewer found it too hard.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Sealy Posturepedic Elevate Ultra Arden Memory Mattress
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FAQ's
How firm is the Sealy Posturepedic Elevate Ultra Arden?
Sealy's own description rates it as medium, although the retailer listing says medium firm. Owner feedback suggests firmness perception varies by individual, and one reviewer found it too hard. If you're a lightweight sleeper who likes a soft surface, treat it as firmer than the label suggests.
Does the Sealy Arden mattress come with a trial period?
Mattress Online lists a 100-night trial, although their customer service replies have mentioned 60 nights, so confirm the current terms before ordering. The trial also requires you to buy a mattress protector from Mattress Online. This is the retailer's own offer, so it won't apply if you buy elsewhere.
How long is the guarantee on the Sealy Elevate Ultra Arden?
The mattress comes with a 7 year guarantee, as listed by the retailer. That covers a reasonable stretch of the mattress's working life, though as always, check the terms for what counts as a manufacturing fault versus normal wear.
Is the Sealy Arden mattress good for allergy sufferers?
It's a strong option. The mattress is Approved by Allergy UK, and the knitted cover carries a ProShield treatment that fights against allergens. That's a reassuring combination if dust mites or similar triggers disturb your sleep.
How deep is the Sealy Posturepedic Elevate Ultra Arden?
It's 30cm deep, which is on the generous side. Do check your fitted sheets before it arrives, as standard sheets can struggle with deeper mattresses.
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