Sealy Posturepedic Elevate Blackwood Single Mattress
The Sealy Posturepedic Elevate Blackwood is a firm mattress built around Sealy's patented AlignSupport coil system, which means you get a supportive, responsive feel rather than the sink-in softness of an all-foam bed.
- Comfort first, then deep support
- Allergy UK endorsed treatment
- Made in Britain, zero-to-landfill
£658
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Sealy Posturepedic Elevate Blackwood Mattress
More available sizes
Mattress details
Mattress
Sealy Posturepedic Elevate Blackwood Mattress
Size
Firmness
Firm
Construction
Foam
Depth (cm)
Layers
4
Layer Details
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.
Key benefits
- Slots into small rooms: At 3ft wide (90 x 190cm), it leaves space for a desk, wardrobe and toy storage in a child's room where every bit of floor counts.
- Firm support for growing sleepers: The AlignSupport coil responds to body contours before delivering deeper support, which suits children and teens whose beds need to do more than feel soft.
- Allergy UK endorsement: The ProShield treatment is endorsed by Allergy UK, a real reassurance in a child's or teenager's bedroom where dust mites are a common worry.
- Cooler in cramped spaces: The SmarTex surface fabric moves heat away from the body, useful in a small or converted room that warms up quickly at night.
- A dependable spare bed: For a study that doubles as guest space, the firm, twice-tempered coil construction holds up to occasional use without going soft where guests sleep.
This size suits you if...
You're buying for one sleeper who needs firm support: a child or teenager moving up to a proper mattress, a student or first-flat renter whose frame came with the room but the mattress didn't, or a spare room that shares its floor space with a desk and needs a bed that stays out of the way.
Consider another size if...
You want space for a couple, or a solo sleeper who likes to sprawl. We'd recommend the UK double instead: it's 45cm wider than the UK single at the same length, and we suggest allowing at least 2.6m x 2.8m of floor space for it.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
What size is the Sealy Blackwood UK single?
It measures 90 x 190cm, which is 3ft x 6ft 3in. That's the standard UK one-person size, so ordinary single sheets and a single duvet fit without hunting for specialist bedding. We suggest a room of at least 2.1m x 2.8m so you can still open drawers and walk around comfortably.
Is the Sealy Blackwood single a good choice for a child or teenager?
In most cases, yes. It's a firm mattress with a responsive coil system, so a growing sleeper gets support rather than sinking in, and the Allergy UK endorsed ProShield treatment helps in dust-prone bedrooms. One caution: a very light child who sleeps on their side may find the firm feel a little unforgiving at the shoulder and hip.
Will the Sealy Blackwood UK single fit a bunk or mid sleeper frame?
The width and length match standard UK single frames, so the footprint is fine. Raised frames also have a maximum mattress depth for the guard rail to work, though, and Sealy doesn't publish a depth for the Blackwood on its product page, so check the depth on the retailer's listing against your frame's limit before ordering.
How much smaller is the UK single than the UK double in this mattress?
The UK single is 45cm narrower than the UK double, and the two are the same length. If you're weighing up the jump, the deciding factor is usually floor space: we suggest at least 2.6m x 2.8m for the UK double, against 2.1m x 2.8m for the UK single.
Where can I buy the Sealy Blackwood in a UK single?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so it's worth checking back before you commit, and the same construction, firm feel and certifications apply wherever you buy. Which retailer suits you may come down to their delivery and returns terms, which vary between sellers.