Last seen for £489 at Mattress Man on 27th October 2026
Silentnight Pocket Essentials 800 Super King Mattress
The Silentnight Pocket Essentials 800 is a medium firm pocket spring mattress with a layer of memory foam, which means you get individual springs that respond to your body shape plus a softer surface feel on top.
- Minimises partner disturbance
- Memory foam adds gentle contouring
- Suits back & front sleepers
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
More available sizes
Last seen for £409 at Mattress Man on 27th October 2026
Last seen for £489 at Mattress Man on 27th October 2026
Last seen for £349 at Mattress Man on 27th October 2026
Last seen for £265 at Mattress Man on 27th October 2026
Mattress details
Mattress
Silentnight Pocket Essentials 800 Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Depth (cm)
Layers
Layer Details
Key benefits
- 90cm each for two people sharing: Each of you gets 90cm each for two people sharing, which means a partner who fidgets or runs hot is simply further away all night.
- Pocket springs matter more at this width: The 800 pocket springs move independently, and combined with the extra distance a super king provides, a restless sleeper on one side becomes genuinely easy to ignore.
- Room for children and pets: When a child wanders in at 3am, or a large dog treats the bed as routine, this width means nobody ends up clinging to an edge.
- An affordable route to maximum space: Super kings usually carry a serious premium, so an entry-level pocket sprung model is one of the cheaper ways to get 180cm of width from a known brand.
- 30cm wider than the UK king: The UK super king is 30cm wider than the UK king and the same length, a difference you feel most on nights when the bed is shared with more than two.
This size suits you if...
You share the bed every night and want the maximum sleeping space a standard UK size offers, your partner is restless enough that distance does more than any mattress technology can, or children and pets regularly join you and a UK king has started to feel crowded. It also suits a large master bedroom or period property where a smaller bed would look lost.
Consider another size if...
Your bedroom is smaller than the 3m x 2.9m we suggest, or you sleep alone and the width would sit unused. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m and is the same length.
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FAQ's
Will the Silentnight Pocket Essentials 800 super king fit in my bedroom?
The mattress measures 180 x 200cm, and we suggest a room of at least 3m x 2.9m so you can walk round the bed and open drawers. Before ordering, check the awkward bits too: door swing, the turn on your landing and any stair pinch points, because a super king is a bulky item to manoeuvre upstairs.
Is a super king worth it for a couple with young children?
If children regularly climb in during the night, yes. With 90cm each for two people sharing, an extra small body can squeeze in without pushing either adult to the edge. On a smaller size the same visit usually means someone gives up sleep, so the width does the work here rather than the mattress itself.
Does a super king help if my partner is restless?
It's the single biggest improvement you can make. The 800 pocket springs already limit how much movement travels across the mattress, and the sheer distance a super king adds does the rest. A partner turning over 90cm away is far easier to sleep through than one at your shoulder on a UK double.
Is the super king much bigger than the king size?
The UK super king is 30cm wider than the UK king, and the two are the same length at 200cm. That 30cm sounds modest but it's the difference between a comfortable two and a workable three when children or pets join in. The trade-off is a bigger room requirement and pricier bedding.
What bedding will I need to buy for this size?
Super king sheets and a 260 x 220cm duvet. Budget for this before you commit, because super king bedding costs noticeably more than king size and the choice in shops is slimmer. It's a running cost of the size rather than the mattress, but it catches people out after an otherwise affordable purchase.