Sealy Posturepedic Elevate Ultra Performance Gel King Size Mattress
The Sealy Posturepedic Elevate Ultra Performance Gel is a soft to medium hybrid combining memory foam, breathable Geltex and Sealy's AlignSupport coil springs, which means you get a cushioned, cradling surface with a supportive spring core underneath.
- Gentle, contouring medium-soft feel
- Geltex & mesh reduce overheating
- Helps keep your spine aligned
£2,459
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Sealy Posturepedic Elevate Ultra Performance Gel Mattress
More available sizes
Last seen for £2,717 at Mattress Online on 5th November 2026
Mattress details
Mattress
Sealy Posturepedic Elevate Ultra Performance Gel Mattress
Size
Firmness
Medium Soft
Construction
Hybrid
Gel
Depth (cm)
33
Layers
6
Layer Details
Quilted cover with ProShield® and SmarTex® treatment
A quilted cover treated with ProShield to repel allergens, which is helpful if dust mites or allergies disturb your sleep. The SmarTex treatment wicks away moisture and helps regulate temperature through the night.
MemorySense® ComfortCore™
A memory foam layer that cradles to your unique shape, which means the mattress moulds around your body contours rather than pushing back against them. The result is a cushioned, calming feel as you settle in.
Geltex
A supremely breathable foam with an open-cell structure, which means heat can escape rather than building up around you. It also provides a soft bounce back, so you won't feel stuck in the mattress.
Cooling mesh
A mesh layer that reduces irritation from moisture build up. It works alongside the breathable foam above to keep the sleep surface fresher.
Interior base plank
A plank within the base that provides additional support while still allowing air to flow through the mattress. This gives the softer comfort layers a stable foundation.
AlignSupport® Coil Springs
Sealy's Posturepedic coil spring system senses and responds to your body weight, which means your spine is kept aligned whatever position you sleep in. The springs are twice tempered, so they hold their responsive nature over time.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- Real space for two: At 75cm each for two people sharing, you can both spread out on the MemorySense foam without negotiating over the middle.
- Less partner disturbance: The AlignSupport springs respond to each body weight individually, and the extra width means an early riser can slip out with less commotion.
- Length for taller sleepers: The UK king is 10cm longer than the UK double, which means anyone approaching 6ft gets their feet on the mattress rather than off the end.
- Cooling across a bigger surface: Two people sharing generate more heat, so the Geltex layer and cooling mesh matter more in a king than they would in a smaller size.
- A gentle feel you can share: The medium soft surface cushions hips and shoulders on both sides of the bed, so different sleeping positions are each catered for.
This size suits you if...
You share the bed every night and a double has started to feel cramped, especially with this mattress's soft, body-hugging surface, which rewards having space to settle into. It also fits if one of you keeps different hours and wants to get up without waking the other, or if either partner is tall enough to appreciate the 200cm length.
Consider another size if...
Your bedroom is smaller than the 2.7m x 2.9m we suggest for a UK king. In that case we'd recommend the UK double instead, which needs at least 2.6m x 2.8m and keeps the same cushioned feel.
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FAQ's
Is a UK king big enough for a couple with different sleep schedules?
Yes, and this is where the size makes a genuine difference. With 75cm each for two people sharing, whoever gets up first has room to move without rolling into their partner, and the AlignSupport springs respond to each body's weight separately, which helps keep movement on one side from travelling across the bed.
Will the Sealy Elevate Ultra Performance Gel king fit my bedroom?
We suggest a room of at least 2.7m x 2.9m for a UK king, which leaves space to walk round both sides and open drawers. A new build master bedroom can feel smaller than the floor plan suggests once fitted wardrobes go in, so measure the usable floor rather than the room itself before ordering.
Is a UK king long enough for someone over six foot?
At 200cm, the UK king is 10cm longer than the UK double, and for a taller sleeper that length is often the real upgrade. Someone around 6ft gets their feet on the mattress rather than hanging over the edge, which lets the memory foam and springs support the whole body properly.
Should we get this mattress in a king or a super king?
The UK king suits most couples: proper personal space without demanding a large room. The UK super king is 30cm wider, the same length, and needs a room of at least 3m x 2.9m. If a pet routinely shares the bed or you simply want maximum space and the room allows it, size up.
What bed frame do I need for this mattress in a king?
You'll need a UK king frame sized for 150 x 200cm, which is longer as well as wider than a double frame, so an old double base can't be reused. This mattress is 33cm deep, a substantial build, so a lower frame often looks and works better, and deep fitted king sheets are essential.