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.
- 90cm of width each: Two people sharing get 90cm apiece, which means a partner turning over happens at a distance rather than against your shoulder.
- Room for night-time visitors: When a child pads in at 3am, or the dog treats the bed as routine, everyone still gets a workable share of the 6ft width.
- Pocket springs at full spread: The 1400 Mirapocket springs plus 1000 mini pocket springs respond to movement locally, so across 180cm of width a fidgeting partner registers even less.
- A cooler bed for two: Two bodies generate more heat than one, and the foam-free wool and Tencel build helps this size stay comfortable where a shared foam mattress can get stuffy.
- Sized for larger rooms: In a big master bedroom where a UK king can look adrift, the 6ft x 6ft 6in footprint fills the space properly.
This size suits you if...
You share the bed every night with a restless partner and want distance rather than a compromise, you regularly end up with children or a large dog alongside you, or you have a big master bedroom where anything smaller would look undersized. Allow at least 3m x 2.9m of floor space, with around 3.5m x 3.2m feeling comfortable.
Consider another size if...
Your bedroom is under our suggested 3m x 2.9m minimum, or you'd struggle to walk round the bed once it's in. We'd recommend the UK king instead: it's the same length, and we suggest at least 2.7m x 2.9m for it.
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What size room do I need for the Silentnight British Wool 2400 in a UK super king?
We suggest a minimum of 3m x 2.9m, and around 3.5m x 3.2m feels right once you add bedside tables and space to walk around. This is our guidance, not Silentnight's. Before ordering, check the door swing and any tight landing turns, because a 180 x 200cm mattress is an awkward carry.
Is the Silentnight British Wool 2400 super king worth it over the UK king?
The UK super king is 30cm wider than the UK king and the same length, and that extra width is entirely for elbow room rather than height. If your room can take it, and one of you is a light or restless sleeper, it's the difference that shows nightly. In a tighter room, the UK king remains the sensible pick.
How much space does each person get on this mattress in a UK super king?
Two people sharing get 90cm each. That's a generous personal zone, enough to stretch out, change position or starfish slightly without crossing into your partner's half. It's the main reason couples size up to a UK super king, especially when one person moves around a lot at night.
Is the UK super king a good choice if children or pets join you at night?
Yes, this is where the size makes most sense. A young child wandering in, or a large dog claiming the foot of the bed, still leaves two adults with usable space across the 180cm width. The pocket springs adjust to movement individually, so a small visitor shuffling about disturbs you less than on a connected spring unit.
Will a restless partner still wake me on the super king version?
Far less than on a smaller size. The 1400 Mirapocket springs plus 1000 mini pocket springs respond to movement where it happens rather than transferring it across the bed, and with 90cm each their tossing happens at arm's length. No mattress removes disturbance completely, but this combination of local support and sheer distance comes close.