Firmness
Type
Hybrid
Depth (cm)
29
Number of Layers
2
Trial Period (nights)
60
Warranty (years)
5
Price Range
£528 to £1,060
Best Sleeping Position(s)
Certifications
Assessed from Silentnight's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
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 from-price of £528 is a real spend, but you get a hybrid build, a 60-night trial and a 5-year guarantee behind it.
Key Features & what's inside
- 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.
Who's it NOT for?
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.
Silentnight Memory Cool 1000 Mattress
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. Prices range from £528 to £1,060 depending on the size you choose. 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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