Silentnight British Wool 2400 Mattress
Mattress
Silentnight British Wool 2400 Mattress
Size
Firmness
Medium
Construction
Depth (cm)
29
Layers
4
Layer Details
- Tencel™ Lyocell sleep surface. A silky, soft-touch cover woven to allow airflow, which means moisture is drawn away from you as you sleep. It's a small detail that helps if you tend to wake up warm.
- Platinum comfort layer. Silentnight says this is 10x more breathable than memory foam with the same pressure relief. In practice, that means a cocooning feel without the heat build-up foam is known for.
- British Wool comfort layer. Wool from Cheviot sheep, flexible and breathable, keeping you cool in summer and warm in winter. It's also part of a traceable British wool scheme.
- Mirapocket® springs and mini pocket springs. 1400 Mirapocket® springs adjust to your movements through the night, so you get support where your body needs it. A further 1000 mini pocket springs sit alongside for extra comfort and breathability.
Layer details from silentnight.co.uk product page, September 2026.
- A shared size for typical UK rooms: At 135 x 190cm, the UK double fits comfortably in bedrooms where a bigger bed would leave no space for wardrobes or drawers.
- Fair space for two: You get 67.5cm each for two people sharing, which works well if you sleep close, though restless sleepers will notice the limit.
- Dual springs across the full width: 1400 Mirapocket® springs plus 1000 mini pocket springs respond independently, which means one of you turning over is less likely to wake the other.
- Wool keeps a shared bed cooler: Two bodies generate real heat overnight, and the breathable British wool and Tencel™ Lyocell surface help this double stay temperate where foam would trap warmth.
- Easy to dress and move: Standard double sheets and a 200 x 200cm duvet are stocked everywhere, and a double is easier than larger sizes to turn on tight landings.
This size suits you if...
You share the bed every night and your bedroom is a typical UK size, where a bigger bed would crowd out bedside tables on both sides. It also suits a solo sleeper who likes room to stretch, or shares the mattress with a pet that claims a corner, and anyone kitting out a guest room that needs to sleep visiting couples comfortably.
Consider another size if...
You sleep alone in a smaller room, perhaps a first flat or second bedroom where every centimetre matters. We'd recommend the UK single instead: it's 45cm narrower at the same length, and we suggest at least 2.1m x 2.8m of room space for it.
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How big is the Silentnight British Wool 2400 in a UK double?
The UK double measures 135 x 190cm, or 4ft 6in x 6ft 3in. At 29cm deep it's a substantial mattress, so check your fitted sheets have enough stretch before it arrives. Standard double bedding fits, including a 200 x 200cm double duvet.
Is the Silentnight British Wool 2400 double big enough for two adults?
For most couples, yes. You get 67.5cm each for two people sharing, and the dual pocket spring system responds to each of you independently, which softens the effect of a partner moving. If either of you is broad shouldered or a restless sleeper, that width may feel snug, but no larger size of this mattress exists.
What size room do I need for the Silentnight British Wool 2400 double?
We suggest allowing at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That leaves enough clearance to walk round the bed and fit bedside tables on both sides, which is usually the deciding factor in an average UK bedroom.
Does the Silentnight British Wool 2400 come in a UK king size?
No. This mattress is made in UK single and UK double only. For scale, the UK double is 15cm narrower and 10cm shorter than a UK king, so if you're set on a king you'll need to look at a different model. For couples choosing this mattress, the UK double is the size to buy.
Where can I buy the Silentnight British Wool 2400 in a double?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so you're seeing current figures rather than a snapshot. Availability can shift, so if the UK double is in stock at a price you're happy with, that's worth acting on.