Silentnight Memory Cool 1000 Mattress
The Silentnight Memory Cool 1000 is a hybrid mattress that pairs 1000 Mirapocket springs with a graphite-infused Memory Cool foam layer, which means you get the contouring feel of memory foam without as much of the heat it usually traps.
- Graphite foam draws heat away
- Minimises partner disturbance
- 60-night trial & 5-year guarantee
£459
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The Silentnight Memory Cool 1000 is rated Medium/Firm by Silentnight, so it suits back and combination sleepers who like a supportive surface, although lightweight side sleepers may find it slightly too firm. At 29cm deep it should fit standard fitted sheets. It comes in five sizes, from UK Single to UK Super King, with a 60-night trial and a 5-year guarantee from Silentnight.
Mattress specifications
Firmness
Medium Firm
Type
Hybrid
Depth (cm)
29
Number of Layers
2
Trial Period (nights)
60
Warranty (years)
5
Price Range
£459 to £879
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
Assessed from Silentnight'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?
If you like memory foam but sleep warm, this is the design brief the Memory Cool 1000 answers. The graphite-infused foam is there to draw heat away from your body, and Silentnight claims it creates a sleep environment 15% cooler than standard memory foam. Beneath it, the 1000 pocket springs sit in individual pockets and respond to movement separately, which means less disturbance from a restless partner and zoned support where your body needs it. The Medium/Firm feel gives a stable, supported sensation rather than a deep sink. Yes, the starting price is a real spend, but you get a hybrid build, a 60-night trial and a 5-year guarantee behind it.
Key features & layer details
Memory Cool™
A graphite-infused memory foam that moulds to your body to relieve pressure while actively moving heat away from you. Silentnight says this creates a sleep environment 15% cooler than standard memory foam, which means less of the clammy feeling memory foam is known for.
Mirapocket® springs
1000 pocket springs, each held in its own fabric pocket so it responds to your movement independently. In practice that means zoned support along your body and less motion transfer across the bed.
Layer details from silentnight.co.uk product page, September 2026.
Best suited for?
Back sleepers
The Medium/Firm rating gives a stable, supported surface rather than a deep sink, which suits anyone who sleeps on their back and likes to feel held level.
Combination sleepers
Medium/Firm support and a responsive pocket spring layer make it easy to change position through the night without feeling stuck in the foam.
Warm sleepers
Graphite-infused memory foam is designed to draw heat away from the body, and Silentnight claims it sleeps 15% cooler than standard memory foam.
Couples
The 1000 pocket springs each sit in their own fabric pocket and move independently, which means less disturbance when a restless partner turns over.
If you love a soft, sink-in feel, the Medium/Firm rating here will likely feel too solid, and lightweight side sleepers in particular may find it a little unforgiving on shoulders and hips. It's also not the cheapest starting point, so strict budget shoppers may want to look elsewhere.
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.
Silentnight Memory Cool 1000 Mattress
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FAQ's
Is the Silentnight Memory Cool 1000 good for hot sleepers?
It's built with hot sleepers in mind. The top layer is graphite-infused Memory Cool foam, which transfers heat away from the body, and Silentnight claims it creates a sleep environment 15% cooler than standard memory foam. The pocket spring core also allows more airflow than an all-foam mattress.
How firm is the Silentnight Memory Cool 1000?
Silentnight rates it Medium/Firm. That suits most back and front sleepers, and heavier side sleepers should still get enough give from the memory foam layer. Lighter side sleepers may find it slightly too firm for pressure relief at the shoulder.
Does the Silentnight Memory Cool 1000 come with a trial and guarantee?
Yes. Silentnight offers a 60-night trial and a 5-year guarantee, so you have two months to decide whether it suits you. Delivery is listed at 14 days.
What sizes does the Silentnight Memory Cool 1000 come in?
Five UK sizes: Single, Small Double, Double, King and Super King. The mattress is 29cm deep, which should work with standard fitted sheets.
How many springs does the Silentnight Memory Cool 1000 have?
It has 1000 Mirapocket pocket springs. Each spring sits in its own pocket and responds to movement individually, which means better zoned support and less disturbance when a partner moves during the night.
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