Horizon Eclipse 3000 Pocket Memory Mattress
Mattress
Horizon Eclipse 3000 Pocket Memory Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
27
Layers
6
Layer Details
- Microquilted cover. A micro-quilted cover gives the surface a smooth, soft finish. It's the first thing you'll feel when you lie down.
- Soft White Fibres. Soft synthetic fillings sit just beneath the cover, which means a cosy, cushioned initial feel.
- Bamboo Memory Foam. A plush layer of bamboo memory foam moulds around your body. This is where the pressure relief comes from, particularly at the hips and shoulders.
- High density foam. A layer of high density foam adds durable comfort and motion isolation. In practice, that means less disturbance when a partner moves.
- Pocket Springs. 2000 pocket springs, each enclosed in its own fabric pocket, respond individually to your weight. An additional layer of 1000 mini springs brings the total to 3000.
- Reinforced foam border. A thick foam border runs around the edge to stop it sagging. Helpful if you tend to sleep near the side of the bed.
Layer details from mattressonline.co.uk product page, September 2026.
- Real room to spread out alone: That extra 30cm of width over a UK single means a solo sleeper can shift position freely, which matters more on a Medium Firm surface where you settle onto the mattress rather than into it.
- Fits rooms a double cannot: At 15cm narrower than a UK double, this size can be the difference between a door that clears the bed frame and one that does not.
- Edges you can actually use: The reinforced foam border matters more at 120cm wide, because a sleeper on a narrower mattress spends more time near the sides.
- Copes with occasional sharing: The high density foam layer limits motion transfer, so when a partner or guest joins for the odd night, their turning is less likely to wake you.
- Standard 4ft size for bedding: The small double is an established UK size, so fitted sheets and frames are straightforward to find, and a standard double duvet works on top.
This size suits you if...
You sleep alone most nights and have outgrown a UK single, but your room cannot spare the width a full double takes. Or you're furnishing a guest room or holiday let where couples stay occasionally rather than nightly, and 120cm of Medium Firm support is enough for the odd shared visit. It also suits a teenager's room where the bed must leave floor space for everything else.
Consider another size if...
You share the bed every night, because 120cm is a squeeze for two adults long term. We'd recommend the UK double instead, which is 15cm wider at the same length; allow at least 2.6m x 2.8m for that size.
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Is a small double Horizon Eclipse 3000 big enough for two adults?
For occasional nights, yes. At 120 x 190cm there's enough room for two to sleep, and the high density foam layer keeps one person's movement from travelling across the mattress. For every night, most couples find it tight. The UK double is 15cm wider at the same length, and that difference is felt every night you share.
What room size do I need for the Horizon Eclipse 3000 small double?
We suggest a room of at least 2.4m x 2.8m. That leaves enough space to walk around the bed and open drawers or a wardrobe without turning sideways. If your room is smaller than that, a UK single would fit more comfortably: it's 30cm narrower at the same 190cm length, and we suggest at least 2.1m x 2.8m for it.
Should I get the Horizon Eclipse 3000 in a small double or a double?
Let the room decide. The UK small double is 15cm narrower than the UK double, and both are 190cm long. If you sleep alone, the small double gives you generous space and frees up floor room. If you share nightly, the UK double is worth the extra width, provided your room meets our suggested 2.6m x 2.8m minimum.
Does the Medium Firm feel change in the smaller size?
The feel is the same across sizes: the same 2000 pocket springs plus 1000 mini springs construction, just fewer springs in a narrower footprint. What does change is how often you use the edges. On a 120cm mattress you sleep closer to the sides, so the reinforced foam border does more of the work here than it would on a wider size.
Where can I buy the Horizon Eclipse 3000 in a UK small double?
Availability shifts, so the most reliable answer is the live price table on this page, which updates as retailers change their listings and prices. It's a less common size than the UK double or UK king, so if you see it in stock at a price you're happy with, it may be sensible to move fairly promptly.