Sealy Webber Elevate Ultra Posturepedic Super King 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
£1,779
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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
- 90cm of width each: Two people sharing get 90cm each, which means a partner who turns over frequently is far enough away that you barely register it.
- Room for the whole household: When children pad through at 3am, or a large dog treats the bed as routine, the extra width means nobody ends up clinging to an edge.
- 30cm wider than the UK king: The UK super king is 30cm wider than the UK king and the same length, a difference you feel every night as genuine personal space.
- Fills a large master properly: In a period house or a big new build master, a UK king can look undersized against the wall; this footprint suits the proportions of the room.
- Check your room first: We suggest allowing at least 3m x 2.9m, and measure door swings and landing turns too, because a 180cm-wide mattress is awkward on tight stairs.
This size suits you if...
You share the bed every night and want the most space a standard UK size provides, your children or pets regularly join you and everyone still needs their own patch, or your partner is restless enough that distance matters more than any comfort layer. Your bedroom should comfortably clear 3m x 2.9m, ideally with room to spare.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest, or your stairs and landing make a 180cm-wide mattress impractical. We'd recommend the UK king instead: it's 30cm narrower, the same length, and needs at least 2.7m x 2.9m.
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FAQ's
Is the Sealy Webber Elevate Ultra super king big enough for a family sharing?
It's the most accommodating size in the range. At 180 x 200cm, two adults get 90cm each, so when a child wanders in during the night there's usually enough width for everyone to settle without anyone hanging off the side. Regular sharers with pets or little ones tend to find the UK super king the only size that copes.
Should I buy the Sealy Webber Elevate Ultra in a UK king or super king?
The UK super king is 30cm wider than the UK king, and the two are the same length, so the decision is about width and your room. If your partner is restless, or children and pets join you often, the extra 30cm makes a real difference. If your room is under our suggested 3m x 2.9m, the UK king is the safer pick.
Will the super king Sealy Webber Elevate Ultra fit in my bedroom?
The mattress itself is 180 x 200cm, but you need clearance to walk round it, open drawers and swing the door. We suggest a room of at least 3m x 2.9m for a UK super king. Measure the stairs and landing too: a mattress this wide can be the hardest thing in the house to move.
Is the super king version worth it for a restless partner?
Distance does more for disturbed sleep than any comfort layer, and 90cm each is the most separation a standard UK size gives you. Sealy publishes limited construction detail for this model, so we can't speak to motion isolation specifically, but the sheer width of the UK super king means most movement simply happens too far away to notice.
Where can I buy the Sealy Webber Elevate Ultra in a super king?
Availability for this size changes, so the most reliable answer is the live retailer table on this page, which is updated as retailers change their prices and stock. Because choice can be limited for this model, it's worth comparing the listings shown here rather than assuming the first price you see is the best one.