Firmness
Medium Firm
Type
Foam
Depth (cm)
30
Number of Layers
3
Trial Period (nights)
100
Warranty (years)
7
Price Range
£734 to £1,298
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 one suits you if you want a supportive, medium feel with a bit of engineering behind it. The ComfortCore™ filling targets the lower back, which means extra reinforcement where most of your weight sits, while the AlignSupport springs are designed to sense and respond to body weight to keep your spine aligned. The springs are twice tempered, a heat treatment that helps them keep their shape over time. Owner feedback on the Mattress Online listing praises the edge support, so you can use the full width of the bed without feeling like you'll roll off. Yes, it starts at £734.00, which is a real spend, but the 7-year guarantee and Allergy UK approval offer some reassurance.
Key Features & what's inside
- Cover. A knitted cover treated with ProShield® fibres and SmarTex™, which means a soft sleep surface with a hygiene-focused finish. One point to know: the retailer listing describes it as quilted in one section and knitted in its specification table, so the exact finish is slightly unclear.
- Comfort Layer. Reflex Foam fillings including ComfortCore™, which targets the lower back, and InfiniLux™ foam for long-lasting comfort. In practice, that means cushioning that's a little firmer under your hips than a basic foam layer.
- Support System. AlignSupport Coil Springs, Sealy's Posturepedic support system, designed to align the spine by sensing and responding to your body weight. The springs are twice tempered, a process that helps them hold their resilience for longer.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
If you love a soft, sink-in feel, this probably isn't your mattress: owners describe it as firm but comfortable, and the medium rating sits at the supportive end. Budget shoppers may also baulk at the £734 starting price when simpler foam options cost less.
Sealy Posturepedic Elevate Holst Mattress
Is the Sealy Posturepedic Elevate Holst firm or medium?
The Mattress Online product page rates it as medium, although some owners in reviews describe it as firm but comfortable. If you're a lightweight side sleeper who prefers a plush surface, it may feel a little firmer than you'd like.
How much does the Sealy Elevate Holst mattress cost?
Prices run from £734 to £1,298 depending on size, with the UK Single at the lower end. It's stocked by 2 retailers, and sizes go up to UK Super King.
Does the Sealy Elevate Holst come with a trial period?
Mattress Online lists a 100-night trial on this mattress. That's the retailer's own offer rather than a Sealy guarantee, so if you buy elsewhere, check that seller's terms before ordering.
What guarantee does the Sealy Elevate Holst have?
The Mattress Online listing states a 7-year guarantee, and retailer feeds show the same 7-year cover. As with any guarantee, confirm the terms with your chosen retailer at the point of purchase.
How deep is the Sealy Posturepedic Elevate Holst?
It's 30cm deep, so check your fitted sheets will stretch to a deeper mattress. That depth comes from the combination of Reflex Foam comfort layers sitting above the coil spring support system.
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