Firmness
Firm
Type
Pocket Spring
Depth (cm)
35
Number of Layers
5
Trial Period (nights)
60
Warranty (years)
5
Price Range
£620 to £1,150
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.
Temperature control is the clear focus here. Vertical Refresh Fibres channel moisture away from your body, and sustainable fresh fibres evaporate it out through a breathable mesh border, which means the bed should feel drier and cooler than a standard quilted mattress. If you're a hot sleeper who still wants the cushioned feel of a pillowtop, that's a rare combination. The British wool blend adds a layer of natural comfort, and the pocket springs give tailored support with easy movement. Yes, £620 as a starting price is a real commitment, but the 34.5cm build, natural materials and Allergy UK approval go some way to justifying it. The 60-night trial means you can change your mind at home.
Key Features & what's inside
- Quilted pillowtop. A quilted pillowtop with an advanced breathable sleep system, which means a soft, cushioned surface that's designed to stop you overheating through the night.
- Refresh Fibres. Vertical Refresh Fibres quickly channel moisture away from your body. In practice, that means sweat is drawn off before it can leave you feeling clammy.
- British wool and fresh fibres blend. Layers of British wool blended with sustainable fresh fibres. Wool naturally regulates temperature, adding a premium, comfortable feel that supports deep, restorative sleep.
- Fresh fibres. Horizontally arranged sustainable fresh fibres evaporate moisture out through the breathable mesh border. This helps keep the sleeping environment clean and fresh over time.
- Pocket spring support system. Individual pocket springs adjust to your body weight, which means support tailored to your shape rather than a one-size feel. They also isolate movement, so a restless partner is less likely to wake you.
Layer details from silentnight.co.uk product page, September 2026.
Who's it NOT for?
This firmer version won't suit everyone. Lightweight side sleepers may find it a little too solid under the shoulders and hips, and the softer variant would be the better pick. At 34.5cm deep it also needs deep fitted sheets, and standard ones may not stretch to fit. Budget shoppers should note the £620 starting price.
Silentnight Rest Assured Nimbus 2000 Pocket Refresh Mattress - Firmer
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Is the Silentnight Nimbus 2000 Pocket Refresh good for hot sleepers?
It's built with hot sleepers in mind. Vertical Refresh Fibres pull moisture away from your body, and sustainable fresh fibres evaporate it through a breathable mesh border. Combined with temperature-regulating British wool, the design aims to keep the sleep surface cool and dry through the night.
How deep is the Nimbus 2000 Pocket Refresh mattress?
It's 34.5cm deep, and that depth applies across all sizes. It's a tall mattress, so you'll likely need deep or extra-deep fitted sheets to get a proper fit.
Does the Nimbus 2000 come with a trial and guarantee?
Silentnight's own site lists a 60-night trial and a 5-year guarantee, with delivery in 14 days. If you buy elsewhere, check that retailer's terms, as trials and guarantees can differ between sellers.
Is the Nimbus 2000 Pocket Refresh hypoallergenic?
Yes. It's naturally hypoallergenic and Allergy UK approved, which makes it a sensible option if allergies or dust mite sensitivity affect your sleep.
What sizes does the Nimbus 2000 Pocket Refresh come in?
Four UK sizes: Single, Double, King and Super King, priced from £620 to £1,150 depending on size.
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