Horizon Juno 5000 Pocket Memory King Size Mattress
The Horizon Juno 5000 Pocket Memory is a 28cm deep hybrid that pairs 5000 springs, 3000 full-size pocket springs plus 2000 mini springs, with bamboo memory foam on top, which means you get springy support underneath and a slower, contouring feel where your body meets the mattress.
- Pressure relief without sinking in
- Minimises partner disturbance
- Removable cover for easy freshening
£1,250
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Horizon Juno 5000 Pocket Memory Mattress
More available sizes
Mattress details
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.
Key benefits
- Genuine space for two: At 75cm each for two people sharing, you can both spread out without negotiating the middle of the bed every night.
- Less disturbance across the width: The 3000 pocket springs respond independently, and across a 150cm width that means an early alarm on one side is easier to sleep through on the other.
- Length for taller sleepers: The UK king is 10cm longer than the UK Double at 200cm, a real relief if either of you is approaching six foot.
- Usable right to the edge: The 4cm foam encapsulated border keeps the perimeter supportive, so the full 150cm width is sleepable rather than a soft strip you avoid.
- Cushioning where you land: The 6cm bamboo memory foam layer contours around shoulders and hips, which side sleepers feel most when they finally have room to sprawl.
This size suits you if...
You share the bed every night and a double has started to feel like a compromise, especially if one of you gets up hours before the other and you want their movement kept to their side. It also suits couples where one partner is tall, since the 200cm length is part of the upgrade, or households where a dog has quietly claimed a share of the mattress.
Consider another size if...
Your bedroom is under our suggested minimum of 2.7m x 2.9m, or you sleep alone. In either case we'd recommend the UK double instead, which needs at least 2.6m x 2.8m and still gives a solo sleeper plenty of room.
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FAQ's
How much space does each person get on the Horizon Juno 5000 UK king?
You get 75cm each for two people sharing. Combined with the independent pocket springs and the high density memory foam layer that reduces motion transfer, that width means a restless partner is far less noticeable than on a narrower mattress.
Is the Horizon Juno 5000 UK king long enough for tall sleepers?
At 200cm, it's 10cm longer than the UK double version of this mattress, which makes a genuine difference if either of you is around six foot. Your feet stay on the memory foam rather than hanging past the edge.
What room size do I need for the Horizon Juno 5000 in a UK king?
We suggest at least 2.7m x 2.9m so you can walk round the bed and open drawers comfortably. If your room falls short of that, the UK double of this mattress needs at least 2.6m x 2.8m and still sleeps two.
Should I size up to the UK super king instead?
The UK super king is 30cm wider than the UK king, the same length, and we suggest at least 3m x 2.9m of room for it. If a dog or child regularly joins you, that extra width helps; otherwise the UK king suits most couples.
Where can I buy the Horizon Juno 5000 in a UK king?
Availability shifts, so the best approach is to compare the retailers listed on this page. The prices shown here are updated as retailers change them, which saves checking each site yourself.