Horizon Discovery 2000 Pocket Memory Super King Mattress
The Horizon Discovery 2000 is a 26cm hybrid that pairs 2,000 springs, split between a 1000 pocket spring unit and 1000 mini springs, with bamboo and memory foam comfort layers.
- Mini springs stop you sinking
- Bamboo foam adds cooling breathability
- Sleep near the edge, no roll-off
£508
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Horizon Discovery 2000 Pocket Memory Mattress
More available sizes
Mattress details
Mattress
Horizon Discovery 2000 Pocket Memory Mattress
Size
Firmness
Medium Firm
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Depth (cm)
26
Layers
4
Layer Details
Removable cover
The cover can be taken off for cleaning, although dry cleaning is recommended rather than a home wash. That is slightly less convenient, but it does help keep the sleep surface fresh.
Bamboo and memory foam comfort layers
Bamboo memory foam and high density memory foam adapt to your shape, which means pressure relief where you sink in most, at the shoulders and hips. The bamboo brings cooling breathability, useful if standard memory foam has felt warm to you before.
1000 mini springs
A layer of 3cm mini springs adds buoyancy, which means the mattress pushes back gently rather than letting you sink too deeply. It gives the foam layers a springier, more responsive feel.
1000 pocket spring unit
Steel springs sit in individual fabric casings and respond independently, so each one moves only where you press. In practice that means better contouring and less disturbance from a partner's movement.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- 90cm each, even when you're not alone: Two people sharing get 90cm apiece, which means a child or dog arriving at 3am borrows space rather than taking yours.
- Width and pocket springs together: The 1000 pocket springs move only where pressed, and at 180cm wide a restless partner is far enough away for that isolation to actually register.
- Usable right to the edge: The 12cm foam border keeps the sides supportive, which matters more at this size because family sharing tends to push adults towards the perimeter.
- Buoyancy across a big surface: The 3cm mini spring layer adds gentle push-back, so moving across a 6ft-wide mattress feels easy rather than like wading through foam.
- Cooler when bodies pile in: Bamboo memory foam breathes better than standard memory foam, useful when a super king is holding more sleepers, and more body heat, than it was bought for.
This size suits you if...
You share the bed every night and a king still feels like a compromise, your children or a large dog treat your bed as partly theirs, or one of you moves so much at night that distance matters as much as any comfort layer. Your bedroom should offer at least 3m x 2.9m, with more feeling comfortable.
Consider another size if...
Your room falls short of the 3m x 2.9m we suggest, or the bed would dominate a modest master. We'd recommend the UK king instead: it is 30cm narrower, the same length, and needs at least 2.7m x 2.9m.
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FAQ's
Is the Horizon Discovery 2000 super king big enough for a couple with children climbing in?
It is the most forgiving size for it. At 180 x 200cm, two adults get 90cm each, so a small visitor in the middle still leaves everyone a workable share. The 1000 pocket springs also localise movement, which means a wriggling child disturbs the surface under them rather than the whole bed.
Will the Horizon Discovery 2000 in a UK super king fit my bedroom?
We suggest a room of at least 3m x 2.9m for the mattress footprint of 180 x 200cm, and something closer to 3.5m x 3.2m feels right if you want bedside tables on both sides and space to walk around. Check door swing and any landing turns too; getting a 6ft-wide mattress upstairs is often the harder part.
Does the UK super king help with a restless partner?
More than any comfort layer can. The pocket spring unit reduces motion transfer because each spring moves independently, but the 30cm of extra width over a UK king is what really does it. At 90cm each, your partner can toss and turn on their side of the bed without ever crossing into yours.
How much bigger is the UK super king than the UK king for this mattress?
The UK super king is 30cm wider than the UK king, and the two are the same length at 200cm. That extra width is the whole argument for sizing up. If your room can't stretch to the 3m x 2.9m we suggest here, the UK king needs at least 2.7m x 2.9m.
Is the edge support good enough for family sharing on the super king?
The 12cm foam border runs around the perimeter, so the sides stay supportive rather than collapsing when you sit or sleep near them. That matters at this size because when children or pets claim the middle, adults end up nearer the edges. You can sleep close to the side without feeling you might roll off.