Horizon Discovery 2000 Pocket Memory Mattress
The Horizon Discovery 2000 is a 26cm hybrid that pairs 2,000 springs, split between a 1000 pocket spring unit and 1000 mini springs, with bamboo and memory foam comfort layers.
- Mini springs stop you sinking
- Bamboo foam adds cooling breathability
- Sleep near the edge, no roll-off
£309
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Horizon describes the Discovery 2000 as medium, which means a balanced feel with some cushioning at the surface rather than a hard finish. It's available in five UK sizes, from Single to Super King, at a price that's good value for a spring count at this level. It comes with a 100 night trial and free next day delivery, so you can try it at home without a long wait. Horizon is a Mattress Online registered line.
Mattress specifications
Firmness
Medium Firm
Type
Hybrid
Depth (cm)
26
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
Price Range
£309 to £599
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 is the two-tier spring system. The 1000 pocket springs respond independently to your weight, which means less motion transfer if you share a bed, while the 3cm mini springs above them add a touch of buoyancy so you feel supported rather than stuck. Bamboo memory foam sits on top, adapting to your shape with cooling breathability, and bamboo is naturally hypoallergenic, a genuine plus if allergies bother you. At 26cm deep it has a substantial feel, and the 12cm wide foam border gives edge-to-edge support, so you can sleep close to the side without rolling off. Add the 100 night trial and the starting price, and it is a sensible mid-market pick.
Key features & layer details
Removable cover
The cover can be taken off for cleaning, although dry cleaning is recommended rather than a home wash. That is slightly less convenient, but it does help keep the sleep surface fresh.
Bamboo and memory foam comfort layers
Bamboo memory foam and high density memory foam adapt to your shape, which means pressure relief where you sink in most, at the shoulders and hips. The bamboo brings cooling breathability, useful if standard memory foam has felt warm to you before.
1000 mini springs
A layer of 3cm mini springs adds buoyancy, which means the mattress pushes back gently rather than letting you sink too deeply. It gives the foam layers a springier, more responsive feel.
1000 pocket spring unit
Steel springs sit in individual fabric casings and respond independently, so each one moves only where you press. In practice that means better contouring and less disturbance from a partner's movement.
Layer details from mattressonline.co.uk product page, September 2026.
Best suited for?
Couples
Independent pocket springs move only where you press, which means less disturbance from a partner's movement, and the wide foam border lets you sleep close to the edge.
Allergy sufferers
The bamboo memory foam on top is naturally hypoallergenic, and the removable cover can be dry cleaned to help keep the sleep surface fresh.
Warm sleepers
Bamboo in the memory foam layer brings cooling breathability, which is useful if standard memory foam has felt too warm for you in the past.
Side sleepers
Bamboo and high density memory foam adapt to your shape, giving pressure relief where you sink in most, at the shoulders and hips.
Combination sleepers
The 3cm mini springs add buoyancy so the mattress pushes back gently, which means you feel supported rather than stuck when you change position.
If you prefer a properly firm surface, this medium feel may be softer than you want. If you prefer all-foam mattresses, you may find the mini springs a little too bouncy.
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 Discovery 2000 Pocket Memory Mattress
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FAQ's
How firm is the Horizon Discovery 2000 mattress?
Horizon rates it as medium. That sits in the middle of the scale, which means a balanced feel with some give at the surface. It suits most sleepers, although anyone who specifically wants a very firm mattress should look elsewhere.
Does the Horizon Discovery 2000 have a trial period?
Yes, it comes with a 100 night trial, so you can sleep on it at home for around three months before deciding. Delivery is free and next day.
How many springs does the Horizon Discovery 2000 have?
It has 2,000 springs in total: a 1000 pocket spring support unit, plus 1000 mini springs measuring 3cm that sit above it to add buoyancy. The pocket springs respond independently, which helps reduce partner disturbance.
What sizes does the Horizon Discovery 2000 come in?
Five UK sizes: Single, Small Double, Double, King and Super King.
Is the Horizon Discovery 2000 good for hot sleepers?
It should cope reasonably well. The bamboo memory foam offers cooling breathability, and the two spring layers allow more airflow than an all-foam design. It is still memory foam at the surface, so extremely hot sleepers may prefer a mattress without foam comfort layers.
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