Sealy Advantage Austen Latex Super King Mattress
The Sealy Advantage Austen is a latex hybrid mattress that pairs a plush latex comfort layer with PostureTech Core Support Springs, which means you get a responsive, body-shaping surface over sturdy full-body support.
- Latex contours without the sink
- Firmer edges, less roll-off feeling
- Allergen-fighting quilted cover
£1,269
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Sealy Advantage Austen Latex Mattress
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Mattress details
Mattress
Sealy Advantage Austen Latex Mattress
Size
Firmness
Medium Firm
Construction
Foam
Hybrid
Latex
Depth (cm)
28
Layers
4
Layer Details
Quilted cover
A soft, cosy quilted cover with ProShield® treatment, which fights against allergens. That makes it a sensible pick if you're prone to reacting to dust mites.
Latex comfort layer
A plush, adaptive material that responds to your body shape for individualised comfort. In practice this means pressure relief with a springy, easy-to-move-on feel rather than a slow sink.
Foam layer
An additional layer of Sealy Firm and Extra Firm foam. This sits between the latex and the springs, adding a firmer transitional feel beneath the softer surface.
PostureTech Core Support Springs
A spring design using unique shapes and varied tension to provide full-body support and pressure relief. EdgeGuard technology firms up the perimeter, which means less roll-off feeling when you sleep near the edge.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- 90cm each, every night: Two sharers get 90cm of width apiece, which means a partner who turns over frequently is far enough away that you rarely feel it.
- Latex keeps movement easy: The latex comfort layer responds quickly rather than letting you sink, so shifting position on a bed this wide takes little effort.
- Usable edges across the full 6ft: EdgeGuard firms up the perimeter, which matters more at 180cm wide: sleepers pushed to the sides by a wandering child still feel supported.
- Room for the whole household: When children or a large dog treat your bed as theirs, the 6ft x 6ft 6in footprint means the adults still get a fair share.
- Medium firm across a big surface: The plush latex over firmer foam and varied-tension springs gives consistent, body-shaping support wherever on the 180cm width you end up sleeping.
This size suits you if...
You share the bed every night and want the most space a standard UK size can give, your partner is genuinely restless and distance matters more to you than any comfort layer, or children and pets regularly join you and a UK king has started to feel crowded. You'll also want a bedroom of at least 3m x 2.9m, which we'd treat as a minimum rather than a comfortable fit.
Consider another size if...
Your bedroom is smaller than the 3m x 2.9m we suggest, or you sleep alone and don't need 180cm of width. Sealy only makes this mattress in a UK super king, so a smaller room means a different mattress rather than a smaller size of this one.
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FAQ's
Does the Sealy Advantage Austen come in sizes other than super king?
No. Sealy currently offers the Advantage Austen in a UK super king only, at 180 x 200cm. If you need a UK king or smaller, you'd have to look at a different latex hybrid altogether, which is a limitation if you like this mattress but have a tighter room.
What room size do I need for the Sealy Advantage Austen super king?
We suggest a bedroom of at least 3m x 2.9m, with around 3.5m x 3.2m feeling more comfortable. That allows walking space on both sides and room for the door to swing. In a period property or a large master this size sits well; in an average double room it can dominate.
Is the Sealy Advantage Austen super king good for couples with children who climb in?
It's one of the better setups for it. The 180cm width leaves 90cm each for two adults, so a small visitor takes a share without leaving anyone clinging to the edge, and EdgeGuard firms up the perimeter for whoever gets pushed outward. The medium firm feel also holds up well under extra, shifting weight.
Will a super king latex hybrid be difficult to get upstairs?
At 6ft x 6ft 6in and 28cm deep, this is a two-person move, and tight landing turns or narrow stairwells are where a super king bites. Sealy doesn't publish a weight for this mattress, so measure your staircase and turning points carefully before ordering, and check the retailer's delivery access guidance.
Is the Sealy Advantage Austen super king enough for a restless partner?
Space is the most reliable fix for a fidgety sleeper, and 90cm each is as much as any standard UK size offers. The latex surface is springy rather than motion-absorbing like memory foam, so the width is doing the work here. Across a bed this size, most movement simply happens too far away to wake you.