Firmness
Type
Pocket Spring
Depth (cm)
37
Number of Layers
4
Trial Period (nights)
60
Warranty (years)
5
Price Range
£454 to £1,440
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.
The main appeal here is pressure relief with cooling built in. The Memory Cool foam is infused with graphite, which Silentnight says transfers heat away from the body to create a sleep surface 15% cooler than standard memory foam, so it's a sensible pick if you like the hug of memory foam but usually find it runs warm. Underneath, the 2000 Mirapocket springs respond to movement individually for zoned support, topped up by 1000 mini springs. The medium soft feel is the deciding factor: lovely if you sleep on your side or want extra give, less suitable if you need a firmer surface. Delivery is within 14 days to your room of choice.
Key Features & what's inside
- Memory Cool™ foam. Graphite-infused memory foam that moulds to your body, relieving pressure while drawing heat away from you. Silentnight says it creates a sleep environment 15% cooler than standard memory foam.
- Mirapocket® springs. 2000 Mirapocket springs sit in individual pockets, each responding to your movement independently. That means zoned support and less disturbance when a partner shifts about.
- Mini springs. A layer of 1000 mini springs adds a second level of zoned support beneath the comfort layers.
- Box top. A sumptuous box top finish for a plush, cushioned surface the moment you lie down.
Layer details from silentnight.co.uk product page, September 2026.
Who's it NOT for?
This is a medium soft mattress, so if you prefer a firm feel or need a more supportive surface for back pain, it's unlikely to suit. The box top also can't be flipped, and at 37cm deep you'll want to check your fitted sheets are deep enough.
Silentnight Memory Cool 3000 Pckt Box Top Mattress
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How many springs does the Silentnight Memory Cool 3000 have?
3000 in total: 2000 Mirapocket springs held in individual pockets, plus a layer of 1000 mini springs. The pocketed design means each spring responds to your movement independently, giving zoned support and reducing motion transfer across the bed.
Is the Silentnight Memory Cool 3000 good for hot sleepers?
It's designed with hot sleepers in mind. The Memory Cool foam is infused with graphite, which Silentnight says actively transfers heat away from the body, creating a sleep environment 15% cooler than standard memory foam. If memory foam has felt too warm for you before, this is one of the reasons to consider it.
How firm is the Silentnight Memory Cool 3000?
Silentnight rates it medium soft, a little softer than a medium, for sleepers who need a little extra give. That gentler feel tends to suit side sleepers and lighter builds, although anyone who prefers a firmer surface should look elsewhere.
Does the Silentnight Memory Cool 3000 come with a trial and guarantee?
Yes. Silentnight offers a 60-night trial and a 5-year guarantee, with delivery within 14 days to your room of choice.
How deep is the Silentnight Memory Cool 3000 mattress?
It's 37cm deep, and that depth is consistent across all sizes, from UK Single through to Super King. It's a tall mattress thanks to the box top, so deep fitted sheets are a sensible buy.
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