Sealy Webber Elevate Ultra Posturepedic King Size 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
£1,369
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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
- Real personal space for two: At 150cm wide the UK king gives 75cm each for two people sharing, enough to change position without disturbing whoever is next to you.
- Less partner disturbance: If one of you leaves for work hours before the other, the extra width means the early riser can slip out with far less bed movement reaching the sleeper.
- Extra length for taller sleepers: The UK king is 10cm longer than the UK double at 200cm, so anyone approaching 6ft finally stops finding the footboard with their toes.
- Fits most main bedrooms: We suggest a room of at least 2.7m x 2.9m, which most UK master bedrooms can manage while keeping bedside tables on both sides.
- Room for the dog too: If a pet on the bed is part of the routine, the width a UK king adds over a double absorbs that habit without either of you losing sleep.
This size suits you if...
You share the bed every night and the UK double has started to feel like a compromise, one of you is close to six foot and needs the 200cm length, or your sleep schedules differ and you want enough width that one person getting up doesn't wake the other.
Consider another size if...
Your bedroom falls short of our suggested 2.7m x 2.9m minimum once wardrobes are in, which is common in new builds. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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FAQ's
Is the Sealy Webber Elevate Ultra worth getting in a UK king for a couple?
For most couples sharing every night, yes on space grounds: the UK king gives 75cm each for two people sharing, a comfortable margin over the UK double. One caution specific to this model: Sealy publishes limited construction detail for it, so ask the retailer about firmness before spending king-size money.
What room size do I need for the Sealy Webber Elevate Ultra in a UK king?
We suggest a room of at least 2.7m x 2.9m for a UK king, with something nearer 3.2m x 3.2m feeling genuinely comfortable. That's our guidance, not Sealy's. Measure with wardrobes and drawers in place, since a new build master bedroom often shrinks quickly once furniture goes in.
How much bigger is the UK king than the double in this mattress?
The UK king is 15cm wider and 10cm longer than the UK double, taking you from 135 x 190cm to 150 x 200cm. The width is what couples notice night to night; the length matters most if either of you is approaching six foot and currently sleeps diagonally to fit.
Should I go for the UK king or the UK super king in the Sealy Webber Elevate Ultra?
The UK king is 30cm narrower than the UK super king, and both are the same 200cm length. If your room comfortably clears the 3m x 2.9m we suggest for the UK super king and you want maximum space, size up. Otherwise the UK king suits most couples without dominating the room.
Where can I compare prices on this mattress in a UK king?
Prices for the Sealy Webber Elevate Ultra in a UK king change often, so the most reliable route is the live pricing shown on this page, which updates as retailers change their prices. It's a higher-tier Sealy, so checking before you buy is sensible rather than optional.