Horizon Juno 5000 Pocket Memory Single 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
£388
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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
- A compact footprint for busy rooms: At 90cm wide, it leaves space for a desk, wardrobe and toy storage in a child's room where every bit of floor counts.
- Full-size comfort for growing sleepers: The medium firm feel with 6cm of bamboo memory foam cushions shoulders and hips, which suits teenagers moving up from a children's mattress.
- Usable right to the edge: The 4cm foam encapsulated border supports the perimeter, so a child near the edge of a 90cm mattress still feels secure.
- Check your frame's depth first: This mattress is 28cm deep, which is taller than many bunk and mid sleeper guard rails allow, so measure before buying for a raised frame.
- Guest-ready without the bulk: In a spare room that doubles as an office, a UK single keeps the working half of the room clear while still sleeping visitors well.
This size suits you if...
You're buying for a child's room or a teenager's first proper mattress, you sleep alone and want the smallest standard adult size, or you're furnishing a spare room, student flat or loft space where the 90cm width is the only footprint that fits.
Consider another size if...
You're an adult who spreads out in the night, or you sometimes share the bed. The UK small double is 30cm wider at the same length, and we suggest at least 2.4m x 2.8m of floor space for it.
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FAQ's
What size is the Horizon Juno 5000 UK single?
It measures 90 x 190cm, which is 3ft x 6ft 3in. That's the standard UK one-person size, so it fits any standard single bed frame or divan. We'd allow at least 2.1m x 2.8m of floor space so you can move around the bed comfortably.
Will the Horizon Juno 5000 UK single fit a bunk bed or mid sleeper?
The width fits, but the depth may not. This mattress is 28cm deep, and many bunk and mid sleeper frames specify a maximum depth so the guard rail stays high enough to be safe. Check your frame's maximum mattress depth before ordering; if it's under 28cm, this one won't be suitable.
Is a UK single big enough for an adult?
For one average-sized adult, yes, and the 4cm foam encapsulated border means the full 90cm width is usable rather than soft at the edges. If you're tall, note the 190cm length. Restless sleepers or anyone used to more space may prefer the UK small double, which is 30cm wider and the same length.
What bedding do I need for this mattress in a single?
Standard single sheets and a single duvet fit, and they're the cheapest and most widely stocked bedding of any UK size. One caveat: at 28cm this is a deep mattress, so check the pocket depth on fitted sheets before you buy, as shallower ones may ping off the corners.
Is the single a good choice for a guest or spare room?
Yes, particularly where the room does double duty as an office or the space is tight, since the 90cm width keeps the rest of the floor free. Guests get the same pocket spring and memory foam comfort as the larger sizes. Compare the retailers listed on this page for the current price.