Sealy Posturepedic Elevate Ultra Webber Memory Mattress
The Sealy Posturepedic Elevate Ultra Webber is a 30cm deep memory foam mattress with a medium to firm feel, built on Sealy's AlignSupport coil springs, which means you get foam comfort at the surface with a springier, more supportive base underneath.
- Extra support for lower back & hips
- Gradual, gentle sink-in feel
- No-flip, single-sided design
£1,069
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The Sealy Posturepedic Elevate Ultra Webber carries a 7-year guarantee and approvals from Allergy UK and the Good Housekeeping Institute for 2023. It's available in UK Single through Super King. It's a considered choice for back and front sleepers who want proper spinal support, although lighter side sleepers may find the medium to firm feel a little unforgiving.
Mattress specifications
Firmness
Medium Firm
Type
Memory Foam
Depth (cm)
30
Number of Layers
5
Trial Period (nights)
100
Warranty (years)
7
Price Range
£1,069 to £1,899
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?
The main draw here is targeted support. The MemorySense Comfort Core sits in the centre third of the mattress, giving extra reinforcement to your lower back and hips, and it was developed with the International Orthopaedic Advisory Board. Beneath that, the AlignSupport coil springs respond to your body weight to keep your spine aligned, so heavier and lighter partners each get appropriate support. The knitted cover uses SmarTex technology, and the mattress is approved by Allergy UK, which matters if you're sensitive to allergens. Yes, it's a real spend, but the 7-year guarantee and single-sided, no-flip design make it a low-maintenance long-term buy.
Key features & layer details
Quilted comfort top
A plush quilted top with InfiniLux foam, which is where the medium to firm feel comes from. It's the surface softness you notice first, before the firmer support kicks in.
Foam comfort layers
A stack of foam layers arranged softest at the top, getting firmer towards the centre. This graduated approach means you sink in gently rather than hitting firmness all at once.
MemorySense Comfort Core
Positioned in the centre third of the mattress to give added support to your lower back and hips. It was developed with the International Orthopaedic Advisory Board, so there's genuine orthopaedic thinking behind the placement.
AlignSupport Coil Springs
Sealy's Posturepedic coil spring system, designed to align your spine by sensing and responding to your body weight. In practice this means the mattress pushes back more where you're heaviest.
BasePlank
A firm foundation layer that underpins the whole mattress. It works with the AlignSupport springs to stop the support layers from sagging into the base.
Knitted cover with SmarTex technology
A knitted top cover using SmarTex technology. It sits over the quilted comfort top rather than being a comfort layer in its own right.
Layer details from mattressonline.co.uk product page, September 2026.
Best suited for?
Back sleepers
The medium firm feel and the MemorySense Comfort Core in the centre third add reinforcement under the lower back and hips, so your spine stays supported.
Front sleepers
Firmer support from the AlignSupport coil springs and BasePlank helps stop your hips sinking too far, which keeps your body level when lying on your front.
Couples
The AlignSupport coil springs respond to body weight, which means heavier and lighter partners each get suitable support from the same mattress.
Allergy sufferers
Approval from Allergy UK sits alongside the knitted SmarTex cover, which gives a reassuring choice if you are sensitive to allergens.
Heavier sleepers
The coil springs push back more where you are heaviest, and the firm BasePlank underneath stops the support layers sagging into the base.
If you sleep on your side and are on the lighter side, the medium to firm feel may not let your shoulders and hips sink in enough. It's also single-sided with no flipping, which some traditionalists dislike, and the starting price won't suit tight budgets.
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 Webber Memory Mattress
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FAQ's
Is the Sealy Elevate Ultra Webber firm or medium?
Sealy describes it as medium to firm. The quilted InfiniLux foam top gives a plush initial feel, but the springs and BasePlank underneath keep it supportive rather than soft. It suits back and front sleepers well, although lightweight side sleepers may find it slightly too firm.
Does the Sealy Elevate Ultra Webber come with a trial?
Mattress Online lists a 100-night trial with this mattress. That's the retailer's own offer rather than a Sealy guarantee, so check the terms wherever you buy. The mattress itself carries a 7-year guarantee.
Is the Sealy Elevate Ultra Webber good for back pain?
It's designed with back support in mind. The MemorySense Comfort Core targets the lower back and hips and was developed with the International Orthopaedic Advisory Board, while the AlignSupport springs respond to your weight to keep your spine aligned. Owner reviews on mattressonline.co.uk mention suitability for back problems.
Do you need to flip the Sealy Elevate Ultra Webber?
No. It's a single-sided mattress with no need to flip, which makes it easier to live with, particularly given it's a substantial 30cm deep.
What sizes does the Sealy Elevate Ultra Webber come in?
It's available in UK Single, Double, King and Super King.
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