Firmness
Medium Firm
Type
Hybrid
Depth (cm)
27
Number of Layers
6
Trial Period (nights)
100
Warranty (years)
5
Price Range
£252 to £1,120
Best Sleeping Position(s)
Certifications
Assessed from Horizon's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
This mattress suits sleepers who want the contouring of memory foam without the fully sunk-in feel, because the pocket springs underneath keep things responsive. The high density foam layer helps with motion isolation, which means a partner turning over is less likely to wake you. Edge support comes from a reinforced foam border designed to stop the sides sagging, useful if you sit on the bed edge or sleep near it. The 100-night trial gives you a proper chance to decide at home, and delivery is free to most locations with next day delivery available on weekdays. One thing to know: it's single-sided, so you rotate it monthly rather than flip it.
Key Features & what's inside
- 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.
Who's it NOT for?
If you prefer a genuinely soft, sink-in feel, the Medium to Firm rating here will likely feel too solid, particularly for lightweight side sleepers. It's also single-sided, so if you want a flippable mattress this isn't one. And some owners have raised concerns about the edge support, so test that during your trial.
Horizon Eclipse 3000 Pocket Memory Mattress
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How firm is the Horizon Eclipse 3000 mattress?
Horizon rates it as Medium to Firm. That suits most back and combination sleepers who want support without hardness, although lightweight side sleepers may find it a little too firm for comfortable pressure relief at the shoulders.
Does the Horizon Eclipse 3000 have a trial period?
Yes, it comes with a 100-night trial, so you can sleep on it at home before committing. There's also a 5-year guarantee covering the mattress itself.
How many springs does the Horizon Eclipse 3000 have?
3000 in total: 2000 full-size pocket springs, each sealed in its own fabric pocket, plus an additional layer of 1000 mini springs. Pocketed springs move independently, which means the mattress adapts to your shape rather than tilting you towards a partner.
Do you need to flip the Horizon Eclipse 3000?
No. It's a single-sided mattress, so you shouldn't flip it. Rotate it monthly instead, head to toe, to keep the fillings settling evenly.
How deep is the Horizon Eclipse 3000 mattress?
It's 27cm deep, made up of six layers including bamboo memory foam, high density foam and the spring unit. Standard deep fitted sheets should fit it without trouble.
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