Sealy Posturepedic Elevate Ultra Webber Memory Mattress
Mattress
Sealy Posturepedic Elevate Ultra Webber Memory Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
30
Layers
5
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.
- 90cm each, every night: Two sharers get 90cm each, which means a partner who turns constantly becomes something you sleep through rather than around.
- Foam that absorbs movement, plus distance: Memory foam already softens the ripple of someone shifting, and at 180cm wide there is simply further for that movement to travel before it reaches you.
- Central support holds under extra bodies: The MemorySense Comfort Core reinforces the centre third of the mattress, useful when a child ends up sleeping across the middle at 3am.
- Springs that suit mismatched partners: The AlignSupport coils respond to body weight individually, so a heavier and lighter sleeper each get proper spinal alignment across all that width.
- Fills a large master properly: In a period house or big new build main bedroom, the 6ft x 6ft 6in footprint looks in proportion where a UK king can seem lost.
This size suits you if...
You share every night with a restless partner and want distance rather than compromise, children or a large dog regularly join you and everyone still needs their own patch, or you have a big master bedroom that clears the 3m x 2.9m minimum we suggest and want the bed to match the space.
Consider another size if...
Your bedroom is smaller than the 3m x 2.9m we suggest, or you need clearance for wardrobes and door swing. We'd recommend the UK king instead: it's 30cm narrower, the same length, and we suggest at least 2.7m x 2.9m for it.
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Is the Sealy Elevate Ultra Webber super king big enough for a couple and a child?
Comfortably, most nights. At 180cm wide, two adults get 90cm each, so a small visitor in the middle still leaves everyone a workable share. The MemorySense Comfort Core sits in the centre third, which is exactly where an extra body tends to land, so support holds up there rather than dipping.
What room size do I need for the Sealy Elevate Ultra Webber in a UK super king?
We suggest at least 3m x 2.9m, which leaves walking room and space to open drawers on both sides. That's our guidance rather than Sealy's. Measure the door swing too, because in a tight room the bed can block it. If your room falls short, the UK king needs at least 2.7m x 2.9m.
How much bigger is the super king than the king in this mattress?
The UK super king is 30cm wider than the UK king, and the two are the same length at 200cm. All of that extra width goes into personal space, taking each sharer from a snug allowance to 90cm each. Firmness, depth and construction are identical across both sizes, so the choice is purely about space and room fit.
Does a restless partner disturb you less on a super king memory foam mattress?
Two things work in your favour here. Memory foam absorbs movement better than a traditional sprung surface, so tossing and turning transfers less to begin with. Then the 180cm width adds physical distance, and with 90cm each you're rarely close enough to feel a fidgeting partner at all. Of the two, the distance does most of the work.
Where can I compare prices for the Sealy Elevate Ultra Webber super king?
Use the price table on this page. The figures shown are pulled from retailers' live listings and updated as they change them, so you're always seeing current pricing for this exact size rather than a from price that applies to the smaller sizes. It's worth a second look before you buy, as larger sizes are discounted more often than you'd expect.