Firmness
Medium Soft
Type
Hybrid
Depth (cm)
33
Number of Layers
6
Trial Period (nights)
100
Warranty (years)
7
Price Range
£1,571 to £2,717
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
This mattress suits sleepers who want a gentle, contouring feel without giving up spinal support. The MemorySense memory foam moulds around your body, which means pressure points like hips and shoulders get cushioned, while the twice tempered AlignSupport springs respond to your body weight to keep your spine aligned. If you're a hot sleeper who has previously found memory foam stifling, the Geltex layer's open-cell structure and the cooling mesh work to reduce overheating. The cover is treated with ProShield, endorsed by Allergy UK, and SmarTex to wick away moisture. It's handcrafted in the UK and Good Housekeeping Institute approved, which gives some reassurance at this price.
Key Features & what's inside
- 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.
Who's it NOT for?
If you prefer a firm, supportive-on-top feel, this soft to medium mattress will likely feel too yielding, particularly for heavier back and stomach sleepers. The 33cm depth is also a genuine consideration: one owner needed a lower bed base, and deep fitted sheets are a must. Budget shoppers should look elsewhere, as prices start at £1,571.
Sealy Posturepedic Elevate Ultra Performance Gel Mattress
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How firm is the Sealy Posturepedic Elevate Ultra Performance Gel mattress?
Sealy's product specification lists it as soft to medium. That means a gentle, contouring surface from the memory foam and Geltex layers, with firmer support arriving from the coil springs beneath. It suits side sleepers and those who like to sink in a little, although fans of a firmer feel may find it too soft.
Does the Sealy Elevate Ultra Performance Gel come with a trial period?
Mattress Online, the retailer listing this mattress, offers a 100-night trial. This is the retailer's own offer rather than a Sealy policy, so if you buy elsewhere, check that seller's terms before ordering.
How long is the guarantee on this Sealy mattress?
It comes with a 7-year guarantee, which appears to be Sealy's standard manufacturer guarantee for this model.
Is this mattress good for hot sleepers?
It's designed with heat in mind. The Geltex layer has an open-cell structure that reduces overheating, a cooling mesh layer reduces moisture build up, and the SmarTex cover treatment wicks away moisture and helps regulate temperature. Memory foam can still sleep warmer than a pure spring mattress, but the cooling features here are genuine.
What sizes does the Sealy Elevate Ultra Performance Gel come in?
It's available in UK Single, Double, King and Super King, priced from £1,571 to £2,717. At 33cm deep it's a tall mattress, so you'll need deep fitted sheets and may want a lower bed base.
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