Sealy PosturePedic Merivale Combination Double Mattress
The Sealy PosturePedic Merivale Combination Mattress uses INFUSE Black Diamond Graphite foam to draw heat away from the body, which means you should sleep cooler on a medium-firm surface.
- Stays cooler through the night
- Eases pressure at hips & lower back
- Cover endorsed by Allergy UK
£1,999
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Sealy PosturePedic Merivale Combination Mattress
More available sizes
Mattress details
Mattress
Sealy PosturePedic Merivale Combination Mattress
Size
Firmness
Medium Firm
Construction
Foam
Open Coil Spring
Depth (cm)
33
Layers
5
Layer Details
EternityFibre surface
A soft EternityFibre surface that keeps the mattress feeling fresh, so it should feel pleasant to settle onto.
INFUSE Black Diamond Graphite foam
A cooling foam that draws heat away from the body, which helps you stay more comfortable if you sleep warm.
INFUSE Eco ComfortCore foam
A plant-based foam that targets pressure relief at the hips and lower back, so those areas feel cushioned.
AlignSupport Coil system
Patented coils that give deep-down, responsive support, so the mattress moves with you and holds you steady.
BasePlank foundation
A foundation with two layers of durable foam that adds stability and strength to the whole mattress.
Layer details from crushedvelvetbedstore.co.uk product page, October 2026.
Key benefits
- Room for two, closely: Each of you gets 67.5cm of width when sharing, which feels familiar if you've slept on a double before and snug if you're used to more.
- Leaves space in the room: We suggest at least 2.6m x 2.8m for a UK double, so a modest main bedroom can still fit drawers and a wardrobe alongside it.
- Edges you can use: The UniCased edge system should keep the sides dependable, which matters on a 135cm wide bed where each sleeper often lies close to the edge.
- Cooler when sharing: The graphite foam is designed to draw heat away from the body, helpful when two people sleeping side by side warm the surface up.
- Easy bedding: Standard double sheets and a 200 x 200cm double duvet fit, and they're sold almost everywhere at a wide spread of prices.
This size suits you if...
You share a bed with a partner in a bedroom of fairly typical UK size and want space left for bedside tables on both sides. It also suits a guest room where visiting couples stay a few nights, or a solo sleeper whose dog or cat likes to claim the bottom corner.
Consider another size if...
You both like plenty of room to spread out, or one of you is tall enough to notice a 190cm length. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
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FAQ's
Is the Sealy Merivale UK double big enough for two adults?
For most couples, yes. A UK double gives 67.5cm each when two people share, which is the long-standing British standard. If either of you sprawls or sleeps hot, the UK king gives 7.5cm more each and is 10cm longer, so you may find that size more comfortable night after night.
What size bedroom do I need for a Sealy Merivale UK double?
We suggest at least 2.6m x 2.8m for a UK double, with around 3m x 3m being the comfortable norm. At that larger size you should be able to walk round the bed and fit bedside tables on both sides, which is harder in a tight second bedroom or first flat.
Sealy Merivale UK double or UK king: which should I choose?
The UK double is 15cm narrower and 10cm shorter than the UK king. Pick the UK double if your room is closer to 2.6m x 2.8m and you want furniture around the bed. If your room allows at least 2.7m x 2.9m and you'd value extra space each, the UK king is the better fit.
What are the dimensions of a Sealy Merivale double in feet?
A UK double Merivale measures 4ft 6in x 6ft 3in, which is 135 x 190cm. The mattress is 33cm deep, so measure your bed frame and headboard height with that depth in mind before you buy.
What bedding fits a Sealy Merivale UK double mattress?
Standard double sheets and a 200 x 200cm double duvet will fit. As the Merivale is 33cm deep, choose fitted sheets described as suitable for deeper mattresses so the corners stay put. Double bedding is easy to find at most price points, which helps if you're furnishing a whole home at once.