Silentnight SleepResponse Support 1400 Pocket Sprung King Size 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
£1,399
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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
- More room each than a UK double: Sharing a UK king gives you 75cm each, which is 7.5cm more per person than a UK double, so elbows and knees meet a little less often.
- Calmer nights on different schedules: The 1400 springs sit in individual pockets and move independently, which means an early riser should disturb the other side slightly less across this wider surface.
- Length for a taller partner: At 200cm long, the UK king adds 10cm over the UK double, so someone over six foot has a better chance of keeping their feet on the mattress.
- Firm, zoned support for two: Silentnight rates this mattress firm and describes its support as zoned, which suits couples who both prefer a firm bed and now want more room to share it.
- Space without a super king's footprint: You gain real personal space while needing a smaller room than the UK super king, which we suggest needs at least 3m x 2.9m.
This size suits you if...
You share the bed every night and wake each other up on a UK double, one of you is tall enough to feel the end of a 190cm mattress, or you both like a firm bed and want more space without giving the room over to a UK super king.
Consider another size if...
Your bedroom measures under 2.7m x 2.9m once wardrobes and drawers are in. The UK double would suit you better, and we suggest at least 2.6m x 2.8m for it.
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FAQ's
Is the Silentnight SleepResponse Support 1400 UK king big enough for two people?
Yes, for most couples. A UK king gives you 75cm each, which is 7.5cm more per person than a UK double. That extra width, along with springs that work independently, should mean a little less nudging when one of you gets up early or shifts position in the night.
What size bedroom do I need for a UK king mattress?
We suggest at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m giving comfortable room to walk round both sides. New build master bedrooms can feel smaller than their floor plan once fitted wardrobes go in, so measure the space that is actually left.
Is a UK king long enough if you're over six foot?
A UK king is 200cm long (6ft 6in), which is 10cm longer than a UK double. For a partner over six foot, that length often matters more than the extra width, because it leaves room for a pillow at the head without your feet hanging off the end.
Silentnight SleepResponse Support 1400 king or super king for a couple?
The UK super king is the same length but gives 90cm each, which is 15cm more per person than the UK king. It also needs more floor space: we suggest at least 3m x 2.9m. If your room is tighter than that, the UK king is the sensible choice.
What bedding fits a UK king Silentnight SleepResponse Support 1400?
You'll need UK king sheets and a 230 x 220cm king duvet. This mattress is 39cm deep, which is deeper than many, so check that any fitted sheet you buy states it suits a 39cm mattress before ordering.