Silentnight SleepResponse Support 1400 Pocket Sprung Super King Mattress
The Silentnight SleepResponse Support 1400 Pocket Sprung Mattress combines 1400 pocket springs with a stitched pillow top, which means you get firm, zoned support with a little softness in the surface layer.
- Firm feel for back sleepers
- Eases pressure with memory foam
- Zoned support from pocket springs
£1,599
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Silentnight SleepResponse Support 1400 Pocket Sprung Mattress
More available sizes
Mattress details
Mattress
Silentnight SleepResponse Support 1400 Pocket Sprung Mattress
Size
Firmness
Firm
Construction
Memory Foam
Pocket Spring
Depth (cm)
39
Layers
3
Layer Details
Pillow top
A stitched pillow top finished in a soft knit cover infused with aloe vera. It adds a softer surface feel on top of the firm mattress.
Memory foam comfort layer
A thin memory foam layer that Silentnight badges as pressure relieving. It gives some cushioning at the surface without losing the firm feel.
Mirapocket pocket spring unit
Individual springs, each in its own fabric pocket, working independently. This gives zoned support that responds to the part of your body pressing on it.
Layer details from dreams.co.uk product page, November 2026.
Key benefits
- 90cm of space each: Two sharers get 90cm each, which means a restless partner's turning reaches you far less than it would on a UK double or UK king.
- 15cm more each than a UK king: Compared with the UK king, you gain 15cm each from the 30cm extra width, and the length stays the same.
- Room for a child or a dog: When a small child or a large dog climbs in during the night, the full 6ft of width means the adults still keep a proper share of the bed.
- Springs that move on their own: The 1400 pocket springs work individually, which means movement on one side is less likely to carry across the full width to the other sleeper.
- In proportion in a big bedroom: In a period property or a generous master bedroom, the 6ft x 6ft 6in footprint fills the space properly where a UK king can look a little undersized.
This size suits you if...
You share with a partner who moves a lot and want the most distance a standard UK size allows, or children and pets end up in your bed most nights, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom falls short of our suggested 3m x 2.9m, or tight stairs make a 6ft mattress impractical. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
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FAQ's
What room size do I need for a Silentnight SleepResponse Support 1400 UK super king?
We suggest at least 3m x 2.9m, and around 3.5m x 3.2m feels more comfortable once bedside tables and wardrobe doors are in. In a loft conversion, the sloping ceiling usually decides which wall takes the headboard, so measure the full-height floor area rather than the whole room.
Is a UK super king worth it over a UK king for a restless partner?
If your partner turns over often, extra distance helps more than any comfort layer can. The UK super king gives 15cm more each than the UK king, and both are the same length. The firm feel is identical in both sizes, so the decision rests on how much space you want and how big your room is.
Can a family fit in a UK super king Silentnight SleepResponse Support 1400?
With 90cm each for two adults, a small child who wanders in at night can settle between you without anyone being pushed to the edge. A large dog that sleeps on the bed as routine is easier to accommodate too. Expect it to feel busy once both a child and a dog join, though.
What bedding fits a 6ft super king mattress?
You'll need super king sheets, and a 260 x 220cm duvet fits this size. As the mattress is 39cm deep, check that fitted sheets are made for deep mattresses before you buy, because standard pockets can struggle to stay on the corners.
Will a UK super king mattress fit up my stairs?
At 180 x 200cm and 39cm deep, the Silentnight SleepResponse Support 1400 in a UK super king is a lot of mattress to carry, and narrow landings or tight turns are where problems arise. Measure door widths and check which way each door swings, then compare the retailers listed on this page.