Silentnight British Wool 2400 Pocket Mattress
Mattress
Silentnight British Wool 2400 Pocket Mattress
Size
Firmness
Construction
Depth (cm)
29
Layers
4
Layer Details
- 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.
- Room for two, space for the room: At 135 x 190cm, this size leaves space for bedside tables on both sides in most UK bedrooms, where a UK king would start to crowd the walls.
- Two sets of pocket springs sharing the load: The 1400 Mirapocket® springs and 1000 mini pocket springs respond to each sleeper independently, which means a partner turning over is less likely to wake you.
- Cool for close-quarters sharing: Two people at 67.5cm each generate warmth, and the breathable British Wool and Tencel™ Lyocell layers move that heat away rather than trapping it.
- Easy to dress and easy to move: Standard double sheets and duvets fit straight away, and this size is far easier to turn up a tight staircase than a UK king or super king.
- Works in a guest room too: Visiting couples expect a double, and the Medium/Firm feel is a safe middle ground for guests whose preferences you can't predict.
This size suits you if...
You share the bed every night and want the traditional couples' size that fits most UK bedrooms, or you sleep alone and fancy space to spread out, perhaps with a dog or cat claiming a corner. It also makes sense if your room is close to our suggested minimum of 2.6m x 2.8m, where a UK king would leave little space to walk around.
Consider another size if...
You and your partner find 67.5cm each a little tight, or one of you is a restless sleeper. We'd recommend the UK king instead: it's 15cm wider and 10cm longer, and we suggest a room of at least 2.7m x 2.9m for it.
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Is the Silentnight British Wool 2400 in a UK double big enough for a couple?
For most couples, yes. You get 67.5cm each for two people sharing, which is the long standing UK standard, and the pocket springs limit how much you feel each other move. If either of you is broad shouldered or sleeps spread out, the UK king adds 15cm of width and 10cm of length.
What are the dimensions of the Silentnight British Wool 2400 UK double?
It measures 135 x 190cm, or 4ft 6in x 6ft 3in, and stands 29cm deep. Standard UK double fitted sheets fit it, though with the 29cm depth you may want deep fitted sheets so the elastic tucks properly under the corners.
What room size do I need for the Silentnight British Wool 2400 UK double?
We suggest a room of at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That allows bedside tables on both sides and space to open wardrobe doors. If your room is smaller, the UK small double is 15cm narrower and the same length, and we suggest at least 2.4m x 2.8m for it.
Should I choose the UK double or UK king in this Silentnight mattress?
It comes down to your room. The UK double is 15cm narrower and 10cm shorter than the UK king, so it fits comfortably where a king would dominate. If you have at least 2.7m x 2.9m to play with and either of you is tall or restless, the extra space of the UK king is genuinely useful.
Where can I buy the Silentnight British Wool 2400 in a UK double?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so what you see reflects current pricing for the UK double rather than a figure that may have drifted since we wrote this.