Sleepeezee Cosmic 3000 Combination Super King 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
£1,599
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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
- Distance from a restless partner: You each get 90cm when sharing, so a partner who turns all night is further away and fewer of their movements reach your side.
- Edges you can use: Reinforced edges and edge-to-edge support give a child tucked in at the side, or a dog at the foot, a steadier surface instead of a soft drop-off.
- Cooler with a crowded bed: Graphite-infused memory foam is meant to draw away heat and moisture, which helps when two adults and a wandering child share the same 6ft of width.
- Same length as the UK king: At 200cm long, the UK super king matches the UK king's length, so sizing up gives you 30cm more width but no extra legroom.
- A room to match: We suggest a bedroom of at least 3m x 2.9m, so you can still walk round a 180 x 200cm mattress that also stands 33cm deep.
This size suits you if...
You share the bed with a partner who fidgets, children who wander in at night or a large dog, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is smaller than 3m x 2.9m, or you mainly want more legroom. We'd recommend the UK king instead. It is the same length, and we suggest at least 2.7m x 2.9m for it.
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FAQ's
How much space does each person get on a Sleepeezee Cosmic 3000 UK super king?
Two people sharing get 90cm each. That is 15cm more each than the UK king and 22.5cm more each than the UK double. If your partner shifts about a lot, that extra gap is what reduces the disturbance, since the comfort layers are the same in every size.
What room size do I need for a UK super king Cosmic 3000?
We suggest at least 3m x 2.9m. In a period property or a loft conversion, also check the door swing, the landing turns and any sloping ceiling, because this is a 180cm wide, 33cm deep mattress. Measure the stairs first, then compare the retailers listed on this page.
Is the Cosmic 3000 UK super king longer than the UK king?
No. The UK super king and the UK king are both 200cm long, so taller sleepers gain nothing in length by sizing up. The UK super king is 30cm wider, which matters if you want more room side to side, for example with children or pets in the bed.
Can a family share a Sleepeezee Cosmic 3000 super king?
A UK super king gives you 6ft of width, so two adults and a small child who comes in at night can usually all find a share. The reinforced edges mean whoever ends up nearest the side has a steadier surface, although a growing family will still feel crowded.
What bedding fits a UK super king Cosmic 3000?
You'll need super king sheets and a 260 x 220cm duvet. The mattress is 33cm deep, so check that any fitted sheet you buy is deep enough before ordering. Bedding at this size costs more than it does for a UK king, so factor that in when you plan.