Horizon Juno 5000 Pocket Memory 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
£459
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Horizon describes the Juno 5000 as medium, so it should suit most back and side sleepers, although heavier stomach sleepers may want something firmer. It comes in five UK sizes, from Single to Super King, at a price that's reasonable for a hybrid with this spring count. You get a 100-night trial and a 5-year guarantee.
Mattress specifications
Firmness
Medium Firm
Type
Hybrid
Depth (cm)
28
Number of Layers
6
Trial Period (nights)
100
Warranty (years)
5
Price Range
£459 to £1,250
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
Assessed from Horizon's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
The main draw here is pressure relief without the sinking feeling an all-foam mattress can give. The 6cm bamboo memory foam layer shapes around your shoulders and hips, while the pocket springs respond to movement independently, which means less disturbance when a partner turns over. A second layer of 2000 mini springs sits beneath, targeting pressure around your back, shoulders and neck. Memory foam does hold warmth, though the bamboo cover is a thoughtful touch. The 4cm foam encapsulated border keeps the edges supportive, useful if you sit on the bed to get dressed. Its starting price undercuts many hybrids with a similar build.
Key features & 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.
Best suited for?
Side sleepers
The 6cm bamboo memory foam layer shapes around your shoulders and hips, which means pressure is eased where side sleepers tend to need it most.
Back sleepers
A medium firm feel with 2000 mini springs targeting the back, shoulders and neck gives back sleepers a supportive surface that still has some cushioning.
Couples
Pocket springs respond to movement independently and a high density memory foam layer reduces motion transfer, so less of a partner's turning reaches your side.
Combination sleepers
The pocket springs give effective bounce back, which means the mattress feels responsive rather than sluggish when you shift between positions overnight.
Budget buyers
The copy says it costs less than many hybrids with a similar build, so you get a high spring count without paying top-tier hybrid money.
If you sleep hot, the memory foam layers may hold more warmth than a traditional sprung mattress, even with the bamboo cover. If you prefer a firm, no-give surface, you will likely find the medium feel too yielding. And at 28cm deep, you may need deeper fitted sheets than you currently own.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Horizon Juno 5000 Pocket Memory Mattress
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FAQ's
How firm is the Horizon Juno 5000 mattress?
Horizon describes it as medium, which means a balanced feel with some give at the surface. That suits most back and side sleepers. Lightweight sleepers should still find enough softness from the 6cm bamboo memory foam layer, while heavier stomach sleepers may prefer something firmer for spinal alignment.
How many springs does the Horizon Juno 5000 have?
It has 5000 springs in total: 3000 full-size pocket springs made from durable steel, plus 2000 mini springs. The pocket springs respond to movement independently, while the mini springs target pressure around your back, shoulders and neck.
Does the Horizon Juno 5000 come with a trial and guarantee?
Yes. Horizon offers a 100-night trial, which gives your body time to adjust before you commit, and a 5-year guarantee covering the mattress itself. A retailer listing also shows a 5 Year Guarantee, so the two align.
How deep is the Horizon Juno 5000 mattress?
It is 28cm deep, which is on the taller side. That depth accommodates the memory foam layers and the dual spring system, though you may need deep fitted sheets to get a proper fit.
What sizes is the Horizon Juno 5000 available in?
Five UK sizes: Single, Small Double, Double, King and Super King. Delivery is free to most locations, with next day delivery available on weekdays.
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