Firmness
Medium
Type
Pocket Spring
Depth (cm)
29
Number of Layers
4
Trial Period (nights)
60
Warranty (years)
5
Price Range
£494
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 regulation is the main reason to pick this one. Wool is naturally breathable, keeping you cooler in summer and warmer in winter, and the Tencel™ surface wicks moisture away, which means you're less likely to wake up clammy. The medium firmness suits most sleepers, although anyone who prefers a very firm, unyielding feel may find it a little soft. Silentnight backs it with a 60-night trial and a 5-year guarantee, so you can change your mind after sleeping on it properly. The size choice is limited, with only a UK Single listed, but for a natural-fill pocket spring mattress at £494, the value is honest.
Key Features & what's inside
- Breathable Tencel™ Lyocell sleep surface. A silky, soft-touch material woven to allow airflow and move moisture away from you as you sleep. The result is a naturally cool feel when you first lie down.
- British Wool Comfort Layer. Wool sourced from Cheviot sheep, chosen because it's flexible and breathable. It helps keep you cool in summer and warm in winter, which means fewer temperature-related wake-ups year round.
- Platinum comfort layer. Silentnight says this layer is 10x more breathable than memory foam while offering the same pressure relief. In practice that means a cocooning, cushioned feel without the heat build-up memory foam is known for.
- 800 Mirapocket® springs plus 1000 mini springs. The 800 Mirapocket® springs adjust to your movements through the night, giving tailored support that follows your body shape. The 1000 mini pocket springs sit alongside for extra comfort and increased breathability.
Layer details from silentnight.co.uk product page, September 2026.
Who's it NOT for?
If you love the slow, sinking hug of memory foam, this foam-free design will feel springier and more responsive than you're used to. It's also currently listed in a UK Single only, so couples will need to look elsewhere. And anyone wanting a firm or extra-firm feel should skip this medium.
Silentnight British Wool 1800 Mattress
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Is the Silentnight British Wool 1800 mattress firm or soft?
It's a medium, confirmed on both Silentnight's own page and retailer listings. That suits most sleeping positions, giving enough cushioning for side sleepers while keeping back sleepers reasonably level, although lovers of a properly firm bed may find it slightly too giving.
How many springs does the Silentnight British Wool 1800 have?
1800 in total: 800 full-size Mirapocket® springs that adjust to your movements, plus 1000 mini pocket springs that add comfort and breathability. Each spring moves independently, which means support is tailored to your body shape rather than spread across the whole surface.
Does the Silentnight British Wool 1800 contain foam?
No, it's described as foam free and uses natural flame retardants. Comfort comes from British wool, a Tencel™ Lyocell surface and a breathable Platinum comfort layer instead, which is good news if you sleep hot or prefer to avoid synthetic foams.
What trial and guarantee comes with the Silentnight British Wool 1800?
Silentnight offers a 60-night trial and a 5-year guarantee, with delivery listed at 14 days. The trial means you can sleep on it at home before committing fully, which takes some of the anxiety out of buying a mattress unseen.
How deep is the Silentnight British Wool 1800 mattress?
It's 29cm deep, so check your fitted sheets will stretch to a deeper mattress before it arrives. That depth reflects the layered build: a Tencel™ surface, wool and comfort layers, then the full spring system underneath.
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