Emma Performance 28 King Size Mattress
The Emma Performance 28 is a 28 cm deep hybrid mattress that combines Emma's AirGrid™ tech, memory foam and zoned pocket springs, which means you get pressure relief from the top layers and responsive support underneath.
- Pressure relief that adapts to you
- Zoned springs add bounce & stability
- 200-night trial & 10-year guarantee
£1,499
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Emma Performance 28 Mattress
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Mattress details
Mattress
Emma Performance 28 Mattress
Size
Firmness
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Depth (cm)
28
Layers
7
Layer Details
Cover
A knit cover with breathable micro-dots that move air outwards, designed to feel cool and ultra soft. It's the first thing your skin meets, so the airflow focus should help if you tend to run warm.
Emma AirGrid™ Tech
Emma's most advanced AirGrid™ layer, a flexible grid engineered to adapt to your body. In practice, this means pressure relief that adjusts to your shape rather than pushing back uniformly.
MemoryAdapt layer
This gives the first comforting hug, responding to your body with immediate cushioning. It's where the pressure relief you feel at hips and shoulders comes from.
SupportBase
A transition layer that keeps you supported in every zone, easing strain on sensitive pressure points. It also creates a smooth handover to the core layers, so you don't feel a sudden change in feel as you sink in.
Zoned pocket springs
These add bounce, extra support and stability, with zoning to give responsive support where you need it. The pocketed design also reduces motion transfer, useful if you share the bed.
SupportBase
A second SupportBase layer that grounds the zoned spring core and keeps the mattress structure stable. Think of it as the foundation everything else works from.
Bottom cover
A simple base cover that keeps the mattress in place on your bed frame.
Layer details from emma-sleep.co.uk product page, September 2026.
Key benefits
- Real space for two: At 75cm each for two people sharing, you can turn over without negotiating territory, which matters more with a responsive hybrid like this.
- Different schedules, less disturbance: If one of you gets up hours before the other, the zoned pocket springs damp movement, and the wider UK king puts more distance between you as well.
- Length for taller sleepers: The 200cm length means anyone approaching 6ft stops sleeping diagonally, and at 5ft x 6ft 6in the proportions suit taller couples.
- Room for a pillow fort: During pregnancy or recovery from surgery, the extra width leaves space to prop pillows and shift position without pushing a partner to the edge.
- A step short of super king: The UK king is 30cm narrower than the UK super king, so it fits rooms where the bigger size would crowd the wardrobes.
This size suits you if...
You share the bed every night and a double has started to feel cramped, especially with the springy, responsive feel of this hybrid. You and your partner keep different hours and want less disturbance when one of you gets up. Or one of you is approaching 6ft and needs the 200cm length more than anything else.
Consider another size if...
Your bedroom is under our suggested minimum of 2.7m x 2.9m, or you sleep alone. We'd recommend the UK double of the Emma Performance 28 instead, which frees up floor space while still sleeping two.
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FAQ's
Is the Emma Performance 28 UK king big enough for a couple?
Comfortably, for most. The UK king gives 75cm each for two people sharing, and the zoned pocket springs reduce motion transfer, so a partner shifting or getting up early is less likely to wake you. If one of you is broad-shouldered or you share with a dog most nights, the UK super king adds another 30cm of width.
What size room do I need for the Emma Performance 28 in a UK king?
We suggest a room of at least 2.7m x 2.9m, with 3.2m x 3.2m feeling comfortable. That's our guidance, not Emma's. New build master bedrooms can be tighter than they first appear once wardrobes go in, so measure the usable floor space, not the whole room.
What sheets fit the UK king Emma Performance 28?
Standard UK king sheets fit the 150 x 200cm footprint, but check the depth. At 28cm, this is a taller mattress than many, so some regular fitted sheets will struggle to stretch over the corners. Look for deep or extra-deep fitted sheets in a UK king and you'll avoid the morning fight with a pinging corner.
Is a UK king long enough for someone over 6ft?
Yes, and it's often the reason to choose it. The UK king is 200cm long, so anyone approaching 6ft gets clearance they wouldn't have on the 190cm sizes. If length is your only concern, note that the UK double of the Emma Performance 28 is 15cm narrower but shares the same 200cm length.
Should a couple choose the Emma Performance 28 in a UK double or UK king?
If your room takes it, the UK king. It's 15cm wider than the UK double, which sounds modest but changes how sharing feels, particularly during pregnancy or recovery when you're propping pillows and changing position through the night. The UK double makes sense where floor space is tight or the bed is mostly for one.