Horizon Juno 5000 Pocket Memory Mattress
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Mattress
Horizon Juno 5000 Pocket Memory Mattress
Size
Firmness
Medium Firm
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Depth (cm)
28
Layers
6
Layer Details
Quilted Memory Foam Cover
A quilted memory foam cover that you can remove, with dry cleaning recommended. Being able to take it off makes freshening the mattress easier than with a fixed cover.
Bamboo Memory Foam
A 6cm layer of plush bamboo memory foam that shapes around your body for a cloud-like surface. This is the layer that cushions your shoulders and hips as you settle in.
High Density Memory Foam
An extra layer of high density memory foam for durable comfort and reduced motion transfer. In practice, that means fewer wobbles reaching your side of the bed when a partner moves.
Pocket Springs
3000 pocket springs made from durable steel span the core, each responding to movement independently. This gives the mattress effective bounce back, so it feels responsive rather than sluggish.
Mini Springs
2000 mini springs sit within the build to target the more delicate parts of your body. They work to relieve built-up pressure around your back, shoulders and neck.
Foam Border
A sturdy 4cm foam encapsulated perimeter secures the mattress and adds durability to the edge. You should be able to use the full width without feeling like you might roll off.
Layer details from mattressonline.co.uk product page, September 2026.
- Distance plus motion isolation: The pocket springs move independently and the memory foam damps wobbles, and at this width your partner's turning happens 90cm away from you anyway.
- Room for night-time visitors: When a child pads in at 3am, a UK super king means everyone keeps a genuine share of the bed rather than clinging to an edge.
- Usable right to the border: The 4cm foam encapsulated edge holds firm, so you can spread across the full 6ft x 6ft 6in without that rolling-off feeling near the sides.
- Fills a larger master properly: In a period property or generous new build master, a UK king can look undersized; this footprint sits in proportion with the room.
- Pressure relief for two different sleepers: The bamboo memory foam contours each sleeper separately, so a side sleeper and a back sleeper can share without compromising on feel.
This size suits you if...
You share the bed every night and want the most space a standard UK size offers, your children or a large dog treat your bed as communal territory, or your partner is restless enough that extra distance matters more than any comfort layer. Your bedroom should measure at least 3m x 2.9m by our guidance, and rooms nearer 3.5m x 3.2m will feel more comfortable around it.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest, or your landing has a tight turn that a 180cm wide mattress won't clear. We'd recommend the UK king instead: it's 30cm narrower, the same length, and needs at least 2.7m x 2.9m.
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Is the Horizon Juno 5000 super king good for couples with a restless partner?
It's one of the better cases for this size. The 3000 pocket springs respond independently and the high density memory foam absorbs movement, so less disturbance crosses the bed. Add 90cm of width each and most turning simply happens too far away to wake you. Lightweight sleepers who still feel everything may value the distance more than the foam.
What size room do I need for the Horizon Juno 5000 in a super king?
We suggest at least 3m x 2.9m, and around 3.5m x 3.2m feels right if you want bedside tables on both sides and space to walk around the foot. That's our guidance rather than Horizon's. In a loft conversion, check the ceiling slope too, since it often dictates which wall a 180cm wide bed can sit against.
Will the Horizon Juno 5000 super king fit up my stairs?
At 180 x 200cm and 28cm deep, this is a large, heavy hybrid, so measure your stairwell, landing turns and door swings before ordering. Hybrids with this spring count can't be folded the way all-foam mattresses sometimes are. If access is genuinely tight, the UK king at 30cm narrower may be the practical choice.
How much space does each person get on the super king version?
90cm each for two people sharing, which is the same width as a UK single per person. The 4cm foam encapsulated border keeps the edges supportive too, so that 90cm is all usable rather than shrinking near the sides. If a child joins you at night, there's still a workable share for everyone.
Is the super king Horizon Juno 5000 worth it over the UK king?
The UK super king is 30cm wider than the UK king and the same length, so the question is purely about width and room size. If your partner is restless, or children and pets share regularly, that extra 30cm changes how the bed feels every night. In a room under our suggested 3m x 2.9m, the UK king is the sounder buy. Compare the retailers listed on this page for current prices.