Sealy Arden Elevate Ultra Posturepedic King Size 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
£1,559
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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
- Proper space for two: At 75cm each for two people sharing, you can both change position without negotiating for territory.
- Less partner disturbance: If one of you gets up hours before the other, the extra width puts more distance between you, so early alarms feel less like a shared event.
- Extra length for taller sleepers: The UK king is 10cm longer than the UK double, which matters more than width if one of you is approaching 6ft.
- A clear step up from a double: It's 15cm wider than the UK double, a difference you notice every night rather than only on paper.
- Fits more bedrooms than a super king: We suggest at least 2.7m x 2.9m for a UK king, achievable in many master bedrooms where a super king would crowd the room.
This size suits you if...
You share the bed every night and a double has started to feel cramped, especially if one of you keeps different hours and the other wakes when they move. The UK king also suits couples where one partner is tall, since the 200cm length gives welcome extra legroom, or where a dog has quietly become a permanent third occupant.
Consider another size if...
Your bedroom is smaller than our suggested minimum of 2.7m x 2.9m, or you sleep alone. In either case we'd recommend the UK double instead, which needs at least 2.6m x 2.8m of floor space.
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FAQ's
Is the Sealy Arden Elevate Ultra worth getting in a UK king rather than a double?
For couples, usually yes. The UK king is 15cm wider than the UK double, so each of you gets 75cm of space, and it's 10cm longer too. If you currently touch elbows in a double or one of you disturbs the other overnight, the width is the upgrade you'll feel most.
What room size do I need for this mattress in a UK king?
We suggest a room of at least 2.7m x 2.9m for a UK king, which leaves enough space to walk around the bed and open drawers. That's our guidance rather than Sealy's. Measure with wardrobes and bedside tables in place, as new build masters often feel smaller once furniture is in.
How much space does each person get on a UK king Sealy Arden Elevate Ultra?
Two people sharing get 75cm each. That's enough to shift position, prop yourself on pillows during pregnancy or after an injury, or absorb a dog claiming the foot of the bed, without pushing your partner to the edge.
Is the UK king long enough if my partner is over six foot?
At 200cm, the UK king suits sleepers approaching and just over 6ft, and it's 10cm longer than the UK double. If your partner is well over 6ft, no wider UK size adds length: the UK super king is the same 200cm long, just 30cm wider.
Should I size up to the super king instead of the king?
Only if your room allows it. The UK super king is 30cm wider than the UK king but the same length, and we suggest at least 3m x 2.9m of floor space for it. If two of you sleep well with 75cm each, the UK king is the more practical choice for most bedrooms.