Sealy PosturePedic Merivale Combination Single 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
£1,599
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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
- Leaves room for everything else: At 3ft x 6ft 3in, the UK single leaves floor space for a desk and wardrobe in a child's room, so the bed doesn't take over.
- Two can fit side by side: Its narrow footprint means a guest room or shared children's room can hold two UK singles with a walkway between, which a pair of larger sizes rarely allows.
- Cooler for a warm sleeper: The graphite foam layer is designed to draw heat away, which helps a teenager or adult in a small, stuffy room who tends to wake up hot.
- Steadier edges on a narrow bed: The UniCased edge system is meant to keep the sides dependable, which helps on a UK single where you sleep and sit close to the edge.
- Allergy UK endorsed cover: The hypoallergenic cover is endorsed by Allergy UK, a reassuring point if you're buying for a child who suffers with dust or allergies.
This size suits you if...
You sleep alone and want a supportive medium firm feel without giving up floor space, you're furnishing a child's or teenager's room that also needs a desk and storage, or you're setting up a spare room with two separate beds for guests.
Consider another size if...
You share the bed, or you're an adult who sprawls and wants more room to turn over. We'd recommend the UK double instead, which is 45cm wider; we suggest at least 2.6m x 2.8m for it.
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FAQ's
Will a UK single Sealy Merivale fit a bunk bed or cabin bed?
Possibly, but measure carefully. The mattress is 33cm deep, which is deep for a raised frame, and many bunk, cabin and mid sleeper beds set a maximum mattress depth so the guard rail stays high enough to be safe. Check the frame maker's guidance before ordering the UK single for one.
What size bedroom do I need for a UK single Merivale mattress?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single. That leaves room to walk around the bed and open drawers, and in a child's room it usually leaves space for a desk or toy storage too.
Is a UK single Sealy Merivale long enough for a tall teenager?
The UK single is 190cm long, or 6ft 3in. That suits most teenagers and adults, although someone very tall may find their feet near the end. The UK king is 10cm longer, but it is also far wider, so it only makes sense if the room can take it.
Should I get a UK single or UK double Merivale for a guest room?
It depends who visits. A UK single suits solo guests and lets you fit two beds in one room for flexibility. If couples stay, the UK double is 45cm wider and gives 67.5cm each for two sharing, which is more comfortable for them over a few nights.
What bedding fits a UK single Merivale mattress?
A standard single duvet, 135 x 200cm, fits the UK single. As the mattress is 33cm deep, look for fitted sheets with a deep pocket, because shallow ones may pop off the corners once you're lying on it.