Sealy Webber Elevate Ultra Posturepedic Double Mattress
The Sealy Webber Elevate Ultra Posturepedic is one of Sealy's Posturepedic range, available in UK Single, Double, King and Super King.
- Medium-firm feel for most sleepers
- Lumbar support in the centre third
- Handcrafted in the UK
£1,229
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Sealy Webber Elevate Ultra Posturepedic Mattress
More available sizes
Mattress details
Mattress
Sealy Webber Elevate Ultra Posturepedic Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
Layers
7
Layer Details
Damask cover
A soft, durable damask knitted cover with ProShield and SmarTex treatments. SmarTex is described as a cooling cover and ProShield as hypoallergenic, so it suits anyone who sleeps warm or is sensitive to allergens.
InfiniLux comfort layer
An InfiniLux foam layer that gives the top of the mattress a luxury feel. It forms the cushioning you lie on first, softening the medium-firm feel a little.
MemorySense ComfortCore
A memory foam layer set in the centre third of the mattress as specialist lumbar support. It adds support under your lower back, where your weight sits most.
Firm and Extra Firm foam
Firm and Extra Firm foam layers sit beneath the comfort layers. They give a durable, supportive base for the softer layers above, so the top doesn't sink too far.
AlignSupport coil springs
Sealy's Posturepedic open coil spring system, which senses and responds to body weight. It supports each part of your body according to how much weight it carries.
UniCased XT surround
A full wall around the perimeter of the mattress. It gives edge-to-edge support, so you can use more of the surface and sit on the edge more comfortably.
BasePlank
The foundation layer of the Webber, which the rest of the mattress is built on. You won't feel it, but it holds everything above it in place.
Layer details from mattressonline.co.uk and mynextmattress.co.uk product pages, October 2026.
Key benefits
- The classic shared size: At 135cm wide, the UK double is the long established standard for two sleepers, which means bed frames, headboards and bases in this size are everywhere.
- Fits rooms a king would crowd: We suggest at least 2.6m x 2.8m for a UK double, so it leaves walking space in bedrooms where a UK king would dominate.
- Room for tables both sides: In most rooms around 3m x 3m, this size still allows bedside tables on each side, so neither of you gives up a lamp and a phone charger.
- Easy, affordable bedding: Double sheets and a 200 x 200cm double duvet are stocked at every price point, which keeps the cost of dressing the bed down.
- Kinder on delivery day: At 4ft 6in x 6ft 3in, a UK double is easier to manoeuvre up the turning stairs of older terraces than the larger sizes in this range.
This size suits you if...
You share the bed every night and your bedroom is the typical British size, roughly 3m x 3m, where a UK king would leave you shuffling sideways past the footboard. It also suits a guest room that hosts visiting couples, or a solo sleeper who likes to spread out, with a dog or cat claiming a corner.
Consider another size if...
You both like space and your room measures at least 2.7m x 2.9m. In that case we'd recommend the UK king instead: it is 15cm wider and 10cm longer, a real difference for two adults.
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FAQ's
Is the Sealy Webber Elevate Ultra in a UK double right for a couple?
For most couples, yes. The UK double gives 67.5cm each for two people sharing, which is the traditional standard rather than a generous one. If either of you is broad shouldered or a restless sleeper, the UK king version of this mattress adds 15cm of width and 10cm of length, provided your room can take it.
What room size do I need for the UK double Sealy Webber Elevate Ultra?
We suggest allowing at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That extra margin is what lets you keep bedside tables on both sides and still open the wardrobe doors fully, which is usually the deciding factor in a typical UK bedroom.
How does the UK double compare with the UK king in this mattress?
The UK double is 15cm narrower and 10cm shorter than the UK king. We suggest at least 2.6m x 2.8m for the UK double and at least 2.7m x 2.9m for the UK king. If your room clears the larger figure and you share the bed, the UK king is the more comfortable long term choice.
Will the UK double version fit up a narrow staircase?
At 135 x 190cm, or 4ft 6in x 6ft 3in, it is the most forgiving couples' size to move, and noticeably easier round a turning staircase or tight new build landing than a UK king. Sealy doesn't publish handling guidance for this exact model, so measure your stairwell's tightest point before ordering.
Where can I compare prices on the Sealy Webber Elevate Ultra in a UK double?
Use the price comparison on this page: the figures shown are updated as retailers change them, so they reflect what you would actually pay today. Availability in a UK double can differ from the other sizes, so check this page rather than a general search, and confirm firmness details with the retailer before buying.