Horizon Juno 5000 Pocket Memory Double 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
£689
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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
- Sensible width for two: You get 67.5cm each for two people sharing, and the pocket springs move independently, so a partner turning over is felt less on your side.
- Usable to the very edge: The 4cm foam encapsulated border matters more at this width, letting both of you sleep close to the edge without that rolling-off feeling.
- Fits the room you actually have: We suggest at least 2.6m x 2.8m of floor space, which means most UK bedrooms take this size with space to walk around.
- Room for bedside tables: At 135cm wide, this size usually leaves space for a table on each side, something a UK king can rule out in a smaller room.
- One feel, two sleepers: The medium firm hybrid build is a fair compromise when a couple has different preferences, cushioning side sleepers while supporting back sleepers.
This size suits you if...
You share the bed most nights and want the traditional couples' size rather than the biggest one your room could physically take, or your bedroom is an ordinary UK size and you'd like bedside tables on both sides with room to open the wardrobe. It also suits a guest room that regularly hosts visiting couples, since the double is what most guests expect to find.
Consider another size if...
You or your partner are broad-shouldered, or you keep waking each other despite the springs, because 67.5cm each is a squeeze for some couples. We'd recommend the UK king instead, allowing at least 2.7m x 2.9m of floor space.
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FAQ's
How big is the Horizon Juno 5000 in a UK double?
The UK double measures 135 x 190cm, or 4ft 6in x 6ft 3in in old money. It's 28cm deep, so measure your bed frame's headboard height and check your fitted sheets will stretch over it. The footprint is 15cm narrower and 10cm shorter than the UK king version.
Is the Horizon Juno 5000 double wide enough for a couple?
It gives you 67.5cm each for two people sharing, which suits most couples, although lightly built pairs will find it roomier than larger ones. The pocket springs respond independently, so movement transfers less across the bed, and the 4cm foam border means the full width stays usable rather than soft at the sides.
What size room do I need for the Horizon Juno 5000 double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That allows walking space on both sides plus room for bedside tables. If your room is smaller, the UK small double is 15cm narrower and the same length, and we suggest at least 2.4m x 2.8m for that size.
Should I get the Horizon Juno 5000 in a double or a king?
The UK double is 15cm narrower and 10cm shorter than the UK king, so the king gives each of you noticeably more shoulder room and suits taller sleepers. The trade-off is floor space: we suggest at least 2.7m x 2.9m for the UK king. In a typical UK bedroom, the double often leaves the room easier to live in.
What bedding fits the double Horizon Juno 5000?
Standard double sheets and a 200 x 200cm double duvet, both stocked everywhere at every price. The one catch is depth: at 28cm, this mattress needs deep fitted sheets, so check the pocket depth on the label before buying, as regular double sheets may ping off the corners.