Firmness
Type
Pocket Spring
Depth (cm)
29
Number of Layers
4
Trial Period (nights)
60
Warranty (years)
5
Price Range
£649 to £899
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 strongest reason to choose this mattress is temperature control without giving up comfort. Silentnight has kept it foam free, using natural flame retardants and a British Wool comfort layer sourced through the British Wools traceable scheme, which means the fillings breathe rather than trap heat. The Platinum comfort layer offers pressure relief similar to memory foam while staying far more breathable, according to Silentnight. Underneath, the combination of 1400 Mirapocket® springs and 1000 mini pocket springs responds to movement through the night, useful if you share a bed. The Medium/Firm feel suits most back and combination sleepers, although lightweight side sleepers may find it a little too firm. The 5-year guarantee is shorter than some brands offer.
Key Features & what's inside
- Tencel™ Lyocell sleep surface. A silky, soft-touch material woven to allow airflow, which means moisture is moved away from you rather than held against your skin. It is the first thing you feel when you lie down.
- Platinum comfort layer. Silentnight describes this as 10x more breathable than memory foam while offering the same amount of pressure relief. In practice that means a cocooning, cushioned feel without the heat build-up foam can cause.
- British Wool comfort layer. Wool from Cheviot sheep, a flexible and breathable material that helps keep you cool in summer and warm in winter. It also lets the mattress stay foam free with natural flame retardants.
- Mirapocket® springs and mini pocket springs. 1400 Mirapocket® springs adjust to your movements through the night, so support follows you as you change position. A further 1000 mini pocket springs add comfort and increase breathability.
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 tension here will likely feel too solid, and lightweight side sleepers in particular may find it presses on shoulders and hips. It's also not for anyone who specifically wants the deep contouring of memory foam, since this mattress is deliberately foam free.
Silentnight British Wool 2400 Pocket Mattress
View all mattresses
Is the Silentnight British Wool 2400 mattress firm or soft?
Silentnight rates it as Medium/Firm. That tension suits most back and front sleepers, and combination sleepers who move around at night, although lighter side sleepers may find it slightly too firm for comfortable pressure relief at the shoulder.
How many springs does the Silentnight British Wool 2400 have?
It has 2400 springs in total: 1400 Mirapocket® springs that adjust to your movements through the night, plus 1000 mini pocket springs that add comfort and improve breathability.
Does the Silentnight British Wool 2400 come with a trial and guarantee?
Yes. Silentnight offers a 60-night trial and a 5-year guarantee. The guarantee is shorter than some brands offer, but the trial gives you two months to be sure it suits you.
Is the Silentnight British Wool 2400 good for hot sleepers?
It's a strong choice if you sleep hot. The mattress is foam free, with a breathable Tencel™ Lyocell surface, a Platinum comfort layer Silentnight says is 10x more breathable than memory foam, and British Wool that helps regulate temperature year round.
What sizes does the Silentnight British Wool 2400 come in?
It's available in UK Single, UK Double, UK King and UK Super King, priced from £649.00 up to £899 depending on size. The mattress is 29cm deep, so most standard fitted sheets should still work.
Couldn't find an answer to your question? Send us a message