Firmness
Firm
Type
Foam
Depth (cm)
Number of Layers
4
Trial Period (nights)
Warranty (years)
Price Range
£707 to £1,247
Best Sleeping Position(s)
Certifications
Assessed from Sealy's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
If you want firm support with a bit of engineering behind it, this is a strong candidate. The AlignSupport coil responds to your body's contours, giving initial comfort followed by deeper support, and it's twice-tempered for durability. The ProShield natural treatment is endorsed by Allergy UK, a genuine reassurance if dust mites or allergies affect your sleep. It has also earned a Which? Best Buy, an independent endorsement rather than a marketing claim. Made in Britain with a zero-to-landfill policy, it suits buyers who care where their mattress comes from. It's at the pricier end for some budgets, but the construction and certifications go some way to justifying that.
Key Features & what's inside
- SmarTex® surface layer. A smart fabric woven into the surface that disperses heat away from your body. In practice, this means less of that clammy, overheated feeling in the small hours.
- Comfort Architecture. A blend of comfort layers and textiles sitting beneath the surface. This is the cushioning you feel first, before the support system takes over.
- AlignSupport™ Coil. Sealy's patented coil system, exclusive to Posturepedic, responds to your body's contours with initial comfort followed by deep-down support. The coils are twice-tempered, which means they're heat-treated for long-lasting strength and consistent performance.
- BasePlank™ Foundation. A solid base providing structural integrity from corner to corner. It works with the coil system above it to improve both support and airflow through the mattress.
Layer details from sealy.co.uk product page, September 2026.
Who's it NOT for?
This is a firm mattress, so lightweight side sleepers may find it doesn't cushion the shoulder and hip enough, leading to pressure points. If you love a soft, enveloping feel, look elsewhere in the Elevate range, which includes plush and medium options. Buyers wanting confirmed trial and delivery terms upfront may also find the available information a little thin.
Sealy Posturepedic Elevate Blackwood Mattress
Is the Sealy Blackwood mattress firm or soft?
Retailer listings describe it as firm. Sealy's own page notes the Elevate range comes in plush, medium and firm options but doesn't confirm which applies to the Blackwood, so it's worth double-checking with your retailer before you buy.
How much does the Sealy Posturepedic Elevate Blackwood cost?
Prices range from £707 to £1,247 depending on size, starting at £707 for the smallest option. It's available in UK Single, Double, King and Super King.
Does the Sealy Blackwood mattress have a guarantee?
Retailer listings mention a 7 year guarantee, though Sealy's own product page doesn't state guarantee terms. Confirm the guarantee with the retailer you buy from, as terms can differ between shops.
Is the Sealy Blackwood good for allergy sufferers?
It's a reasonable choice. The mattress uses Sealy's ProShield natural treatment, which is endorsed by Allergy UK, an independent endorsement rather than a manufacturer claim.
Where is the Sealy Blackwood mattress made?
It's handmade in Britain, in Cumbria, and Sealy states a zero-to-landfill policy for production. That's a genuine plus if provenance and waste matter to you.
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