Sleepeezee Zenith 4500 Combination King Size Mattress
The Sleepeezee Zenith 4500 Combination Mattress combines a plush pillow top with micro springs and a double layer of graphite memory foam, which means a softer-feeling surface that helps draw heat away as you sleep.
- Plush pillow top feels cushioned
- Graphite foam draws heat away
- Support that runs edge to edge
£1,599
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Sleepeezee Zenith 4500 Combination Mattress
More available sizes
Mattress details
Mattress
Sleepeezee Zenith 4500 Combination Mattress
Size
Firmness
Medium
Construction
Memory Foam
Pocket Spring
Depth (cm)
35
Layers
4
Layer Details
Breeze 3D knit cover
A knitted cover that's up to 40% more breathable than standard fabrics, which means air moves more freely at the surface.
Plush pillow top with micro springs
A plush pillow-top layer with micro springs that adds a softer surface. It gives the mattress a cushioned feel on top of its medium rating.
Double graphite memory foam
Two layers of graphite-infused memory foam that help draw heat away from the body, so you get foam comfort with less heat build-up.
Pocket spring unit
Individually wrapped pocket springs giving responsive support and edge-to-edge support, so the whole surface feels usable.
Layer details from crushedvelvetbedstore.co.uk product page, November 2026.
Key benefits
- More room between you: At 75cm each for two people sharing, you get 7.5cm more each than on a UK double, which means an early riser can slip out with less jostling.
- Length for taller sleepers: The UK king is 10cm longer than a UK double, so a partner over six foot can stretch out without their feet reaching the end.
- Edges you can sleep on: Pocket springs support edge to edge, which means the outer strip of a 150cm-wide bed feels usable rather than wasted.
- Less heat between two bodies: Two layers of graphite memory foam help draw heat away, which helps when two people share the same mattress all night.
- Plan the room first: At 5ft x 6ft 6in and 35cm deep, it fills a room, so we suggest a bedroom of at least 2.7m x 2.9m.
This size suits you if...
You share the bed every night and one of you keeps waking when the other gets up early, one partner is over six foot and a UK double leaves no spare length, or the dog sleeps on the bed and takes more than its share of the middle.
Consider another size if...
Your bedroom is under 2.7m x 2.9m, which is common in a new build once fitted wardrobes go in. We'd recommend the UK double instead, which we suggest for rooms of at least 2.6m x 2.8m.
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FAQ's
Is the Sleepeezee Zenith 4500 UK king big enough for two people?
For most couples, yes. A UK king gives you 75cm each for two people sharing, which is 7.5cm more each than a UK double. That extra space helps during pregnancy, when one of you is propped on pillows and shifting position through the night. Couples who sprawl may still want the UK super king.
Will a tall person fit on the Sleepeezee Zenith 4500 king size?
The UK king is 200cm long, 10cm longer than a UK double, so it suits anyone approaching or over six foot. If length is your main reason for upgrading, the UK super king won't help, because it is the same length as the UK king. You'd only be paying for extra width.
What room size do I need for a UK king Zenith 4500?
We suggest at least 2.7m x 2.9m, with 3.2m x 3.2m feeling comfortable once bedside tables and wardrobes are in. Measure after furniture is placed rather than going by the floor plan. At 35cm deep, it also sits high, so check it clears your headboard.
Should we get the Zenith 4500 in a UK king or UK super king?
The UK super king gives 90cm each for two people sharing, so the UK king gives you 15cm less each. We suggest at least 3m x 2.9m for the UK super king, against 2.7m x 2.9m for the UK king. If your room only just fits a UK king, stay with it.
What bedding fits a Sleepeezee Zenith 4500 in a UK king?
Standard king sheets and a 230 x 220cm king duvet fit the 150 x 200cm surface. Because this mattress is 35cm deep, look for a deep fitted sheet so the corners stay tucked under the pillow top rather than pinging off overnight.