Sealy PosturePedic Gladesville Combination Single Mattress
The Sealy PosturePedic Gladesville Combination Mattress pairs a plush EternityFibre comfort layer with an extra-firm feel, which means you get a very supportive bed with a slightly softer surface on top.
- Extra-firm feel for firm-bed sleepers
- Plush fibre layer softens the surface
- Allergy UK endorsed cover
£1,199
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Sealy PosturePedic Gladesville Combination Mattress
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Mattress details
Mattress
Sealy PosturePedic Gladesville Combination Mattress
Size
Firmness
Extra Firm
Construction
Eco-Friendly
Foam
Depth (cm)
27
Layers
3
Layer Details
EternityFibre
A plush fibre comfort layer that Sealy says adds cushioning and a softer surface. It gives the top of this extra-firm mattress a little more comfort.
INFUSE Eco ComfortCore
A plant-based foam that forms part of the mattress. Sealy doesn't state where it sits in the build, but it adds a plant-based material to the construction.
AlignSupport coils
Patented coils that form the base of the mattress. They provide the firm, supportive feel this mattress is rated for.
Layer details from dreams.co.uk product page, November 2026.
Key benefits
- Space left for everything else: At 90 x 190cm, the UK single needs a room of at least 2.1m x 2.8m by our guidance, which leaves floor space for a wardrobe or desk alongside it.
- A narrow fit for loft conversions: The 3ft width keeps the footprint slim, so you can tuck the bed under a sloping ceiling and keep the full-height part of the room for walking and dressing.
- Two beds where one won't do: A pair of UK singles lets siblings or two guests sleep apart with a walkway between them, provided your room is wide enough for both frames.
- Firm support for one grown-up body: The AlignSupport coils give the extra firm feel, with an EternityFibre layer softening the surface slightly, which suits teenage or adult back and front sleepers best.
- Bedding that's easy to replace: Standard single sheets and a single duvet (135 x 200cm) fit, so replacing bedding after a spill or a growth spurt is straightforward.
This size suits you if...
You sleep alone and like a very firm bed, you're furnishing a teenager's room or a first flat where floor space is tight, or you need two separate beds in a guest room or shared children's room.
Consider another size if...
You share your bed, or a light, young side sleeper will use it. For sharing, we'd recommend the UK double instead: it gives 67.5cm each, and we suggest at least 2.6m x 2.8m.
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FAQ's
Will the Sealy Gladesville UK single fit a bunk bed or mid sleeper?
Possibly, but check first. At 27cm deep it is a thick mattress for a raised frame, and bunks, cabin beds and mid sleepers usually set a maximum mattress depth so the guard rail stays high enough above the sleeper. Look up the frame maker's limit before ordering, and if 27cm exceeds it, choose a shallower mattress for that frame.
What size is a Sealy Gladesville single mattress in feet?
The UK single measures 3ft x 6ft 3in, which is 90 x 190cm. Single sheets and a single duvet are the right bedding for it, so you won't need anything made to order.
How big does a bedroom need to be for a UK single Gladesville?
We suggest allowing at least 2.1m x 2.8m. That leaves room to get in and out comfortably and still fit a wardrobe or small desk. For two singles side by side, measure for both frames plus a walkway, then compare the retailers listed on this page for this size.
Is the Gladesville UK single a good mattress for a child?
It depends on the child. It's rated extra firm, and the fibre surface only softens it a little. A teenager who sleeps on their back or front may get on well with it, but a younger, lighter child who sleeps on their side may find it presses at the shoulders and hips.
Is a UK single long enough for a tall adult?
At 190cm, the UK single is the same length as the UK double. If you need more length, the UK king is 10cm longer than the UK single and also much wider. We suggest at least 2.7m x 2.9m for a UK king, so measure your room before sizing up.