Sealy Arden Elevate Ultra Posturepedic Super King Mattress
The Sealy Arden Elevate Ultra Posturepedic Mattress is available in UK Single, UK Double, UK King and UK Super King.
- Allergy UK approved cover
- Supportive edge-to-edge perimeter
- Handcrafted in the UK
£2,029
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Sealy Arden Elevate Ultra Posturepedic Mattress
More available sizes
Mattress details
Mattress
Sealy Arden Elevate Ultra Posturepedic Mattress
Size
Firmness
Medium
Construction
Depth (cm)
Layers
7
Layer Details
Damask cover
A knitted damask cover treated with SmarTex and ProShield to manage heat, moisture and allergens. It helps keep the surface comfortable and suits sleepers who want a hypoallergenic cover.
MemorySense ComfortCore
A specialist support layer for the lumbar region. It is there to support the middle of your body, where your weight sits deepest.
GelTex layer
A deep GelTex comfort layer sits beneath. It adds cushioning between the surface and the support below.
Firm foam
A supportive, durable firm foam layer. It adds stability and helps the comfort layers above keep their shape.
AlignSupport coil springs
Sealy's AlignSupport spring system, built to provide support and posture. It forms the main support under the foam layers.
UniCased XT surround
A wall that runs round the full perimeter of the mattress. It gives edge-to-edge support, so you can use more of the surface.
BasePlank support
The foundation layer of the Arden. It gives the springs and foam above a solid base to work from.
Layer details from mattressonline.co.uk and mynextmattress.co.uk product pages, October 2026.
Key benefits
- 90cm each for two sharers: You each get 90cm of width, which means turning over, spreading out or reading late happens on your side without disturbing anyone.
- Distance beats disruption: If your partner fidgets or wakes at odd hours, the extra 30cm over a UK king puts genuine space between you, which no comfort layer can match.
- Room for night-time visitors: When children pad in at 3am or a large dog treats the bed as home, a super king still leaves the adults a reasonable share.
- Full 200cm length: At 6ft 6in long, taller sleepers keep their feet on the mattress rather than hanging off the end.
- A sensible fit for larger rooms: In a big master or period bedroom a UK king can look undersized; the super king fills the space in proportion.
This size suits you if...
You share every night and want the maximum standard sleeping space, your partner is restless enough that distance matters more than any mattress feature, or children and pets join you often enough that a UK king feels crowded. It also suits larger master bedrooms where a smaller bed would look lost. Allow at least 3m x 2.9m of floor space, ideally more.
Consider another size if...
Your bedroom is under our suggested 3m x 2.9m minimum, or you rarely share the bed. 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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FAQ's
Will a super king mattress fit in my bedroom?
The Sealy Arden Elevate Ultra in a UK super king measures 180 x 200cm, and we suggest a room of at least 3m x 2.9m, with around 3.5m x 3.2m feeling comfortable. Check door swing and any tight landing turns too, as a mattress this wide is awkward on stairs.
Is the super king Sealy Arden Elevate Ultra big enough for a family sharing?
It's the most practical standard size for it. With 180cm of width, a child climbing in at night or a large dog at the foot of the bed still leaves both adults a workable share. In a UK king the same arrivals tend to push someone to the edge.
How much wider 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. Split between two sharers, that extra width is the difference between feeling a partner's every turn and barely noticing them.
What bedding do I need for this size?
Super king sheets and, ideally, a 260 x 220cm duvet. Bedding at this size does cost more than king equivalents, which is a running expense to factor in, but the generous duvet overhang is part of what stops sharers fighting over covers.
How much space do two people get on a super king?
90cm each for two people sharing, which is the same width per person as a UK single. In practice that means each of you sleeps as though you had a single bed to yourself, just without the gap in the middle.