Silentnight British Wool 1800 King Size Mattress
The Silentnight British Wool 1800 is a medium-feel pocket spring mattress built around natural materials, with a wool comfort layer sourced from Cheviot sheep and a Tencel™ Lyocell sleep surface.
- Wool & Tencel wick away moisture
- Medium feel suits most sleepers
- 60-night trial & 5-year guarantee
£574
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Silentnight British Wool 1800 Mattress
More available sizes
Mattress details
Mattress
Silentnight British Wool 1800 Mattress
Size
Firmness
Medium
Construction
Foam
Pocket Spring
Wool
Memory Foam
Natural
Depth (cm)
29
Layers
4
Layer Details
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.
Key benefits
This size suits you if...
Consider another size if...
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's