Silentnight UltraGel 1000 Pocket Pillowtop Super King Mattress
The Silentnight UltraGel 1000 Pocket Pillowtop is a hybrid mattress that pairs 1000 Mirapocket springs with a gel-infused comfort layer and a plush pillowtop, which means you get a bit of bounce underneath and a soft, sink-in feel on top.
- Medium-soft feel for side sleepers
- Plush pillow top over responsive gel
- 60-night trial & 5-year guarantee
£780.42
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Silentnight UltraGel 1000 Pocket Pillowtop Mattress
More available sizes
Mattress details
Mattress
Silentnight UltraGel 1000 Pocket Pillowtop Mattress
Size
Firmness
Medium Soft
Construction
Foam
Pocket Spring
Hybrid
Gel
Depth (cm)
29
Layers
3
Layer Details
Gel-infused comfort layer
A gel-infused foam layer that responds as you move, paired with breathable foam. In practice this means a responsive, slightly bouncy feel rather than the slow sink of traditional memory foam.
Plush pillowtop
A soft pillowtop stitched to the surface for that sink-in feel. This is what gives the mattress its cushioned, medium soft character.
Mirapocket springs
1000 Mirapocket springs, each housed in its own fabric pocket so they move independently. Silentnight says the zoned design is scientifically proven to improve spinal alignment and posture, which you'll feel as firmer support where your body is heaviest.
Layer details from silentnight.co.uk product page, September 2026.
Key benefits
- Space beats motion transfer: With 90cm each for two people sharing, a fidgeting partner is simply further away, and the 1000 Mirapocket springs move independently to soften what movement does carry across.
- Room for night-time visitors: When a child pads in at 3am, the 180cm width means everyone keeps a workable share of the plush pillowtop rather than clinging to the edges.
- Softness without crowding: Medium soft mattresses can leave couples rolling towards each other; at 6ft x 6ft 6in there's enough width for each sleeper to settle into their own dip.
- Pets on the bed, by design: If a large dog sleeps at your feet most nights, the extra width and 200cm length absorb that routine without anyone losing their spot.
- Full-length stretch: At 200cm long, taller sleepers get the same generous length as a UK king, with 30cm more width to spread out in.
This size suits you if...
You share the bed every night and one of you moves around enough to wake the other, you have children or a dog who treat your bed as theirs, or you have a large master bedroom where a UK king would look and feel undersized. The soft, sink-in feel suits side sleepers and lighter bodies who also want maximum space.
Consider another size if...
Your bedroom is smaller than the 3m x 2.9m we suggest, or you'd rather spend the difference on the room around the bed. The UK king is 30cm narrower and the same length, and needs at least 2.7m x 2.9m; we'd recommend it instead.
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FAQ's
Is a super king worth it for a restless partner?
Often, yes. The pocket springs in the UltraGel 1000 already isolate movement reasonably well, since each of the 1000 Mirapocket springs sits in its own fabric pocket. But nothing calms a disturbed night like distance, and 90cm each for two people sharing means most tossing and turning happens too far away to notice.
How much bigger is a super king than a king?
The UK super king is 30cm wider than the UK king, and the two are the same length at 200cm. That extra width is roughly the difference between sleeping close and each having a genuinely separate zone, which matters on a medium soft mattress like this one where you settle in rather than lie on top.
Will the Silentnight UltraGel 1000 super king fit in my bedroom?
We suggest a room of at least 3m x 2.9m for a UK super king, and that's our guidance rather than Silentnight's. In a loft conversion, check the sloping ceiling too: the wall that takes a 180cm-wide bed may not be the one you'd planned. Measure door swing and landing turns before ordering.
Is a medium soft mattress too soft for a super king shared with kids?
Not necessarily. The pillowtop is soft, but the zoned Mirapocket springs firm up under the heaviest parts of the body, so adults stay supported while a child dozing in the middle sinks in comfortably. The 180cm width does the real work here: everyone gets space rather than a fight over the centre.
Where can I buy the UltraGel 1000 in a super king?
Stock and pricing shift regularly at this size, so the most reliable answer is the live comparison table on this page, which is updated as retailers change their prices. It's a mid-range mattress, and the UK super king sits at the top of the size range, so comparing before you buy can make a real difference.