Silentnight British Wool 3000 King Size Mattress
The Silentnight British Wool 3000 is a pocket spring mattress with a medium/soft feel, available in UK Double and UK King.
- Cool-touch, moisture-wicking surface
- Medium-soft, foam-free comfort
- 60-night trial & 5-year guarantee
£1,139
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Silentnight British Wool 3000 Mattress
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Mattress details
Mattress
Silentnight British Wool 3000 Mattress
Size
Firmness
Medium Soft
Construction
Foam
Pocket Spring
Wool
Memory Foam
Depth (cm)
33
Layers
4
Layer Details
Tencel™ Lyocell sleep surface
A silky, soft-touch fabric woven to allow airflow and move moisture away from you, which means the surface feels naturally cool. It's a small detail you'll appreciate on warm nights.
Platinum comfort layer
Silentnight states this is 10x more breathable than memory foam with the same amount of pressure relief. In practice that means a cocooning, cushioned feel without the trapped heat foam can bring.
British Wool Comfort Layer
Wool from Cheviot sheep gives a flexible, breathable layer with natural body and bounce. It's part of what keeps this mattress foam free while still feeling comfortable and supportive.
Mirapocket® springs and mini pocket springs
2000 Mirapocket springs adjust to your movements through the night, so support follows you as you change position. A further 1000 mini pocket springs sit alongside for added comfort and increased breathability.
Layer details from silentnight.co.uk product page, September 2026.
Key benefits
- 75cm each for couples: Two people sharing get 75cm of width apiece, so one of you can prop pillows or shift position without pushing the other to the edge.
- Pocket springs limit partner disturbance: The 2000 Mirapocket springs respond individually, which means an early alarm on one side travels less across a UK king's width than it would on a smaller mattress.
- Extra length for taller sleepers: At 200cm long, the UK king adds 10cm over the UK double, a real difference if either of you is approaching six foot.
- Breathable at a bigger size: Wool and Tencel lyocell wick moisture, so two bodies sharing the bed all night generate less of the clamminess an all-foam surface can trap.
- Fits more rooms than you'd think: We suggest allowing at least 2.7m x 2.9m, which many UK master bedrooms manage once you plan around wardrobes.
This size suits you if...
You share the bed every night and a double has started to feel cramped, one of you gets up hours before the other and you'd like the movement to travel less, or either of you is tall enough that 200cm of length is the upgrade you actually need. It also suits couples whose dog has quietly claimed a corner of the mattress as its own.
Consider another size if...
Your bedroom falls short of the 2.7m x 2.9m we suggest for a UK king, or you mostly sleep alone. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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FAQ's
Is the Silentnight British Wool 3000 available in a UK king?
Yes. The UK king measures 150 x 200cm, or 5ft x 6ft 6in, and is the larger of the two sizes this mattress comes in, the other being the UK double. You can compare the retailers listed on this page for current pricing.
Is the UK king worth it over the UK double for this mattress?
For couples, usually. The UK king is 15cm wider and 10cm longer than the UK double, which means more personal space each night and welcome extra length if either of you is tall. Since this mattress only comes in these two sizes, the UK king is also your only route to more room.
Will a UK king version of this mattress fit my bedroom?
We suggest allowing at least 2.7m x 2.9m, with more feeling comfortable once wardrobes and drawers are in. New build master bedrooms can be tighter than they look on the plan, so measure with furniture in place. If the space won't stretch, the UK double needs at least 2.6m x 2.8m.
Does a king size help if my partner gets up earlier than me?
It helps on two fronts. The 75cm of width each keeps you further from the movement, and the 2000 Mirapocket springs respond individually rather than as one surface, so an early exit on one side is less likely to wake you. The medium/soft feel cushions rather than bounces, which helps too.
Is the king size long enough for someone over six foot?
At 200cm, the UK king gives noticeably more legroom than the 190cm UK double, the only other size this mattress is made in. That 10cm matters if your feet currently hang over the end. For anyone tall, length is often the stronger reason to size up than width.