Sleepeezee Cosmic 3000 Combination Small Double Mattress
The Sleepeezee Cosmic 3000 Combination Mattress pairs graphite-infused memory foam with micro and pocket springs under a plush pillow top, which means a soft-feeling surface that works to keep heat away.
- Cooler sleep with graphite foam
- Plush pillow top cushioning
- Supportive edges, no roll-off feeling
£1,299
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Sleepeezee Cosmic 3000 Combination Mattress
More available sizes
Mattress details
Mattress
Sleepeezee Cosmic 3000 Combination Mattress
Size
Firmness
Construction
Memory Foam
Pocket Spring
Depth (cm)
33
Layers
3
Layer Details
Plush pillow top
A pillow top finished with reinforced edges. It adds cushioning to the surface, and the reinforced edges help the sides feel steadier.
Graphite-infused memory foam
A memory foam infused with graphite, which draws away heat and moisture. That should help you stay cooler through the night.
Micro and pocket springs
Layers of micro and pocket springs, with 3,000 springs in total, though Sleepeezee doesn't give a size. They provide tailored support and cooling comfort underneath the foam.
Layer details from dreams.co.uk product page, November 2026.
Key benefits
- Room to spread out alone: At 30cm wider than the UK single, a solo sleeper can turn over or sleep starfish-style without hitting the edge.
- Edges you can use: The reinforced pillow top edges help the sides feel steady, which matters more on a 120cm surface where you'll often lie close to the edge.
- Fits tighter rooms: We suggest at least 2.4m x 2.8m for a UK small double, so it can suit a box room or a loft conversion where a wider bed would block the door.
- Same length as a double: The UK small double and the UK double are both 190cm long, so you give up 15cm of width but no legroom.
- Cooler for warm sleepers: The graphite-infused memory foam is designed to draw away heat, which helps if your small bedroom tends to get stuffy overnight.
This size suits you if...
You sleep alone, like to spread out and your room only just takes a 4ft bed, or you're furnishing a guest room where couples stay for the odd weekend. It also fits a teenager who has outgrown a UK single but whose bedroom can't spare much floor space.
Consider another size if...
Two of you will share it every night. We'd recommend the UK double instead, which gives 67.5cm each; allow at least 2.6m x 2.8m.
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FAQ's
Is a UK small double Sleepeezee Cosmic 3000 big enough for two people?
For occasional stays, yes, and a guest room is a sensible use for it. Nightly sharing is a different matter, because 120cm is tight for two adults. If you'll share every night, the UK double gives 67.5cm each and is the same 190cm length, so you only gain width.
What room size do I need for a Sleepeezee Cosmic 3000 small double?
We suggest at least 2.4m x 2.8m for a UK small double. That leaves space to get in and out and open the door. The mattress is 33cm deep, so in a loft conversion with a sloping ceiling, check the headroom above the bed as well as the floor space.
What bedding fits a 4ft Sleepeezee Cosmic 3000?
Small double (4ft) fitted sheets fit, with a standard double duvet on top. Because the mattress is 33cm deep, check the sheet's pocket depth before buying, as shallower fitted sheets can struggle to tuck under a deep pillow top.
Is the Cosmic 3000 in a UK small double good for a teenager?
It suits a teenager who has outgrown a UK single well. A UK small double is 30cm wider than the UK single at the same 190cm length, so the extra space goes into width, where a growing teenager notices it most, while the bed only claims a little more floor.
Sleepeezee Cosmic 3000 small double or double: which should I choose?
Choose the UK small double if you sleep alone or your room is under 2.6m x 2.8m. The UK double is 15cm wider at the same length and suits couples sharing nightly. If you're downsizing, measure the new bedroom rather than relying on what fitted the old one.