Silentnight Comfort Breathe 1000 King Size Mattress
The Silentnight Comfort Breathe 1000 is a medium/firm pocket sprung mattress with a focus on temperature control.
- Breathable fibres for hot sleepers
- Hypoallergenic, dust mite resistant
- 60-night trial & 5-year guarantee
£387.33
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Silentnight Comfort Breathe 1000 Mattress
More available sizes
Mattress details
Mattress
Silentnight Comfort Breathe 1000 Mattress
Size
Firmness
Medium Firm
Construction
Foam
Pocket Spring
Memory Foam
Depth (cm)
24
Layers
5
Layer Details
Sleep Surface
A naturally hypoallergenic 100% polyester fabric that's soft and gentle on the skin. A sensible choice if allergies tend to disturb your sleep.
Comfort Breathe®
Silentnight states these fibres are 15x more breathable than standard memory foam, promoting airflow and regulating temperature. In practice, that means less overnight heat build-up, which hot sleepers will appreciate.
1000 Mirapocket Spring Unit
1000 Mirapocket springs respond individually to your body's movements, which means support where you need it rather than a one-size-fits-all push back. The zoning helps keep your spine aligned.
Protective Layer
This layer disperses pressure from the spring unit across the mattress. The aim is a longer usable life, as it stops the springs wearing through to the comfort layers above.
Durable Case
A soft, durable outer case that holds everything together and helps the mattress stay comfortable over the years.
Layer details from silentnight.co.uk product page, September 2026.
Key benefits
- Room to sleep apart, together: The UK king is 15cm wider than the UK Double, which means each of you gets space to stretch without negotiating for the middle.
- Springs that stay on their side: Because each of the 1000 Mirapocket springs responds individually, movement from a partner leaving early stays largely on their half of the 150cm width.
- Length for taller sleepers: At 200cm, the UK king is 10cm longer than the UK Double, a genuine relief if one of you is approaching six foot.
- Cooler across a bigger surface: The Comfort Breathe fibre layer promotes airflow, and the wider surface means less shared body heat pooling between you overnight.
- A budget-friendly route to a king: This is a simple pocket sprung construction, which keeps the cost of upgrading to a king lower than most; compare the retailers listed on this page for current pricing.
This size suits you if...
You share the bed every night and a double has started to feel cramped, especially if one of you gets up hours before the other and the disturbance carries across the mattress. It also suits you if one partner is tall enough that their feet reach the end of a 190cm bed, or if a dog has quietly become a permanent third occupant taking more than its share.
Consider another size if...
Your bedroom is smaller than the 2.7m x 2.9m we suggest for a UK king, particularly once fitted wardrobes are in. In that case 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 Comfort Breathe 1000 king size good for couples?
Yes, and arguably better than the smaller sizes. The 150cm width gives you 75cm each for two people sharing, and the 1000 Mirapocket springs respond individually to movement, so one restless partner disturbs the other less. The medium/firm tension suits most sharing couples, although lightweight side sleepers may find it a little firm.
Will the king size Comfort Breathe 1000 fit in my bedroom?
We suggest a room of at least 2.7m x 2.9m for a UK king, which leaves space to walk round both sides and open drawers. New build master bedrooms can be tighter than they first appear once wardrobes go in, so measure the usable floor rather than the room on the plan.
Is the Silentnight Comfort Breathe 1000 UK king long enough for tall people?
At 200cm, the UK king is 10cm longer than the UK Double, so anyone approaching six foot gains genuinely useful legroom. If width is your priority rather than length, the UK super king is 30cm wider but the same length, so sizing up beyond king only helps with space, not height.
Does the king size reduce partner disturbance on this mattress?
It helps in two ways. The pocket springs move independently, so motion from one side transfers less to the other, and the 150cm width means you're simply further apart than on a double. If one of you keeps early hours, that combination makes a quiet exit far more achievable.
Where can I buy the Comfort Breathe 1000 in a UK king?
Availability shifts, so the most reliable answer is the live comparison table on this page. The prices shown here are updated as retailers change them, so check back before you buy rather than relying on a figure you saw last week.