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.
- Real space for two: At 75cm each for two people sharing, you can both stretch out without negotiating, a difference you feel every night compared with a double.
- Less disturbance across the bed: The AlignSupport coil springs respond to each sleeper's weight separately, so a partner getting up early is less likely to pull you awake with them.
- Length for taller sleepers: The UK king is 10cm longer than the UK double at 200cm, which means anyone approaching six foot stops sleeping diagonally or hanging their feet off the end.
- Central support where couples need it: The MemorySense Comfort Core runs through the centre third, so both sleepers' lower backs and hips get reinforcement rather than only the middle of the bed.
- Fits most main bedrooms: We suggest a room of at least 2.7m x 2.9m for a UK king, which most master bedrooms manage without giving up wardrobe space.
This size suits you if...
You share the bed every night and a double has started to feel cramped, especially with a medium firm surface that rewards having your own space. It also suits you if one of you is on the taller side and needs that full 200cm of length, or if you keep different hours and want a partner's alarm to stay their problem.
Consider another size if...
Your bedroom falls short of the 2.7m x 2.9m we suggest for a UK king, or you sleep alone. In either case we'd recommend the UK double instead, which needs a room of at least 2.6m x 2.8m.
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Is the Sealy Elevate Ultra Webber in a UK king big enough for a couple?
Comfortably, for most. Two people sharing get 75cm of width each, and because the mattress has a medium firm feel with responsive coil springs, you tend to stay settled in your own space rather than drifting into each other. If one of you sprawls or a dog claims a corner most nights, the UK super king adds another 30cm of width.
Should I choose the UK king or UK super king in this Sealy mattress?
The UK king suits most couples and most rooms. The UK super king is 30cm wider, the two are the same length, and we suggest a room of at least 3m x 2.9m for it. Go bigger if you regularly share with a child or pet, or if you both like serious sprawling room; otherwise the UK king is the sensible pick.
Is a UK king Sealy Elevate Ultra Webber long enough for someone over six foot?
At 200cm long, or 5ft x 6ft 6in in imperial terms, the UK king gives you 10cm more length than the UK double. For anyone around or just over six foot, that extra length is often the upgrade that matters more than width, letting you lie flat with your feet on the mattress rather than off the end.
Will this mattress in a UK king help if my partner gets up earlier than me?
It should reduce the disturbance. The AlignSupport coil springs push back according to each person's weight, so movement on one side transfers less to the other, and at 150cm wide there's simply more mattress between you. No mattress makes a 5am alarm silent, but the combination of width and independent support helps you stay asleep.
What room size do I need for the UK king version of this mattress?
We suggest at least 2.7m x 2.9m, with something like 3.2m x 3.2m feeling genuinely comfortable once wardrobes and bedside tables are in. New build master bedrooms can be tighter than they look on a floor plan, so measure with furniture in place. If your room falls short, the UK double needs at least 2.6m x 2.8m.