Firmness
Medium Firm
Type
Memory Foam
Depth (cm)
30
Number of Layers
5
Trial Period (nights)
100
Warranty (years)
7
Price Range
£1,049 to £1,849
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
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, the from price of £1,049 is a real spend, but the 7-year guarantee and single-sided, no-flip design make it a low-maintenance long-term buy.
Key Features & what's inside
- 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.
Who's it NOT for?
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 at £1,049 upwards it won't suit tight budgets.
Sealy Posturepedic Elevate Ultra Webber Memory Mattress
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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, priced from £1,049 to £1,849 depending on size.
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