Silentnight Essentials Pocket 600 King Size Mattress
The Silentnight Essentials Pocket 600 is a medium-feel pocket spring mattress built around 600 zoned Mirapocket springs, which means each spring moves independently to spread your weight evenly and support spinal alignment.
- Zoned pocket spring support
- Medium feel suits most positions
- 60-night trial & 5-year guarantee
£349
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Silentnight Essentials Pocket 600 Mattress
More available sizes
Last seen for £319 at Mattress Man on 25th October 2026
Last seen for £239 at Mattress Man on 4th October 2026
Mattress details
Mattress
Silentnight Essentials Pocket 600 Mattress
Size
Firmness
Medium
Construction
Pocket Spring
Depth (cm)
24
Layers
5
Layer Details
Cover
Top Layer
Silentnight comfort layer
Layer 2
Single layer of 600 pocket
Key benefits
- Space to sleep on different schedules: If one of you gets up hours before the other, 75cm each for two people sharing means less crossing into each other's space overnight.
- Pocket springs limit partner disturbance: Each of the 600 springs compresses on its own, which means movement on one side transfers less to yours than a basic open coil would.
- Extra length for taller sleepers: The UK king is 10cm longer than the UK double, a genuine relief if either of you is approaching six foot.
- Room for the dog too: If a pet joins you most nights and takes more than its share, the UK king absorbs that habit far better than a UK double.
- Easier to handle at 24cm deep: A slightly shallower single-sided build makes rotating a 150cm-wide mattress head-to-toe a manageable two-person job rather than a struggle.
- A sensible price for the step up: This is the affordable end of Silentnight's range, so upgrading to a UK king doesn't demand a luxury budget; compare the retailers listed on this page.
This size suits you if...
You share the bed every night and keep waking each other, you or your partner are tall enough to appreciate the 200cm length, or you want a proper pocket spring mattress in a couples size without stretching to a premium price. Your bedroom can also spare at least 2.7m x 2.9m, which is what we suggest as a minimum for a UK king.
Consider another size if...
Your room is smaller than the 2.7m x 2.9m we suggest for a UK king. We'd recommend the UK double instead: it needs at least 2.6m x 2.8m and still sleeps two comfortably.
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FAQ's
How much space do two people get on the Pocket 600 UK king?
The UK king is 150cm wide, which works out at 75cm each for two people sharing. Because the 600 Mirapocket springs move independently, that space feels more usable too: your side of the mattress responds to you rather than to whoever is next to you.
Is the UK king Pocket 600 long enough for someone over six foot?
At 200cm, the UK king is 10cm longer than the UK double, and that length is often the real reason taller sleepers upgrade. It won't suit everyone extremely tall, but for anyone around the six foot mark it removes the feet-hanging-off problem a 190cm mattress creates.
Will the Pocket 600 in a UK king stop me feeling my partner move?
It should reduce it noticeably. Pocket springs compress individually, so movement doesn't ripple across the way it does on a linked open coil. Combined with the wider 150cm surface, a partner turning over or leaving early in the morning is much less likely to disturb you.
What room size does a UK king version of this mattress need?
We suggest at least 2.7m x 2.9m for a UK king, which leaves room to walk around and open drawers. In a new build master bedroom, measure after accounting for wardrobes: rooms that look generous empty can feel tight once furniture is in.
Is the UK king worth it over the double for this mattress?
The UK king is 15cm wider than the UK double and 10cm longer, which for most couples is the difference between negotiating space and simply having it. Given the Pocket 600 sits at the affordable end of Silentnight's range, the step up is less of a stretch than on pricier models.