Sealy Posturepedic Elevate Holst Mattress
Mattress
Sealy Posturepedic Elevate Holst Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
30
Layers
3
Layer Details
- Cover. A knitted cover treated with ProShield® fibres and SmarTex™, which means a soft sleep surface with a hygiene-focused finish. One point to know: the retailer listing describes it as quilted in one section and knitted in its specification table, so the exact finish is slightly unclear.
- Comfort Layer. Reflex Foam fillings including ComfortCore™, which targets the lower back, and InfiniLux™ foam for long-lasting comfort. In practice, that means cushioning that's a little firmer under your hips than a basic foam layer.
- Support System. AlignSupport Coil Springs, Sealy's Posturepedic support system, designed to align the spine by sensing and responding to your body weight. The springs are twice tempered, a process that helps them hold their resilience for longer.
Layer details from mattressonline.co.uk product page, September 2026.
- Real separation from a restless partner: With 90cm each for two people sharing, a partner who turns all night becomes far easier to sleep through.
- Edge support you'll actually use: Owner feedback on the Mattress Online listing praises the edge support, which matters more at this size because you're paying for every centimetre of that 180cm width.
- Room for night-time visitors: When a child pads in at 3am, or the dog treats your bed as their own, a UK super king absorbs the extra body without anyone giving up their share.
- Fills a larger master properly: In a period property or a generous new build master, a UK king can look a little lost; the extra 30cm of width sits better in the space.
- Sprung support across the full width: The AlignSupport coil springs respond to body weight wherever you lie, so two sleepers of different builds each get support on their own side.
This size suits you if...
You share the bed every night and want enough space to sleep undisturbed, you have children or pets who regularly join you and need everyone to keep a fair share, or your bedroom is large enough that a UK king would look undersized against the wall.
Consider another size if...
Your room is smaller than the 3m x 2.9m we suggest as a minimum, or you'd rather spend less on bedding and linen. We'd recommend the UK king instead: it's 30cm narrower, the same length, and needs a room of at least 2.7m x 2.9m.
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How big is the Sealy Elevate Holst in a UK super king?
It measures 180 x 200cm, which is 6ft x 6ft 6in. Shared between two people, that works out at 90cm each, the same width per person as a UK single. It's the widest size the Elevate Holst comes in, and the same length as the UK king.
What size room do I need for the Sealy Elevate Holst UK super king?
We suggest a room of at least 3m x 2.9m. That leaves enough space to walk round the bed and open drawers without shuffling sideways. This is our own guidance rather than Sealy's, so if your room is borderline, measure with the door swing and any wardrobes in mind.
Should I get the Sealy Elevate Holst 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. If you share with a restless partner, or children and pets join you at night, the extra width earns the bigger room it needs. For the UK king we suggest a room of at least 2.7m x 2.9m.
Is the super king worth it for a restless partner?
Often, yes. No comfort layer fully cancels out a fidgety sleeper, but distance does: 90cm each means most movement simply happens too far away to wake you. The Elevate Holst's praised edge support also helps here, because you can spread out to the very edge without feeling like you'll roll off.
Where can I check prices for the Sealy Elevate Holst super king?
Use the comparison table on this page. Prices for the UK super king change regularly, so the figures shown here are updated as retailers change them. That's a safer bet than a price you saw quoted last week, and it lets you compare stockists side by side before you buy.