Silentnight Comfort Breathe 1400 Mattress
Mattress
Silentnight Comfort Breathe 1400 Mattress
Size
Firmness
Construction
Depth (cm)
28
Layers
4
Layer Details
- Hand tufted sleep surface. A hand tufted top made from naturally hypoallergenic fabric, which means the fillings stay in place and sensitive sleepers get a gentler start. Silentnight describes this as a softer sleep surface, taking a little of the edge off the firm feel beneath.
- Comfort Breathe™ fibres. A second layer of breathable fibres for increased airflow and improved temperature regulation, which means heat is less likely to build up around you overnight. Silentnight says it also adds firmer pressure relief.
- 1400 Mirapocket springs. The springs sit in individual pockets and respond independently to your body's movements, which means zoned support and better spinal alignment rather than a uniform surface. The 1400 count is for the king size, with counts adjusted pro rata for other sizes.
- Durable case. A soft, hard-wearing outer case built to keep the mattress comfortable over the years. The underside is a polypropylene and polyester blend, with a polyester-led side border.
Layer details from silentnight.co.uk product page, September 2026.
- 90cm of width each: Two people sharing get 90cm each, which means a fidgeting partner is far enough away that you rarely feel them move at all.
- Independent springs across a wide surface: The Mirapocket springs move on their own, so movement on one side of this 180cm width barely travels to the other.
- Room for the whole household: At 6ft x 6ft 6in, a child creeping in at 3am or a large dog claiming a corner still leaves both adults a proper share.
- Breathability matters more when you share: Two bodies generate more heat than one, and the Comfort Breathe fibre layer helps that warmth escape rather than build up between you.
- Firm support edge to edge: The firm feel stays consistent across the full width, so sleeping nearer the edge on a busy night still gives you proper support.
This size suits you if...
You share the bed every night and want enough distance that a restless partner, children or pets stop waking you, your bedroom comfortably clears our suggested 3m x 2.9m minimum, and you like a firm, supportive feel rather than a soft, sink-in one.
Consider another size if...
Your room is under our suggested 3m x 2.9m minimum, or the bed would crowd out wardrobes and walking space. We'd recommend the UK king instead: it's 30cm narrower, the same length, and needs at least 2.7m x 2.9m.
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Is the Silentnight Comfort Breathe 1400 UK super king big enough for co-sleeping with children?
It's about as big as standard sizes get. At 180 x 200cm, two adults get 90cm each, so a child wandering in overnight still leaves everyone a reasonable share. The independent Mirapocket springs also help here: a small person climbing in tends to disturb the mattress locally rather than waking the whole bed.
Does the UK super king version have 1400 springs?
Not exactly. Silentnight's 1400 count applies to the king size, with the number adjusted pro rata for other sizes. Since the UK super king is the largest size in the range, you can expect proportionally more springs than the king, though Silentnight doesn't publish the exact figure for this size.
What room size do I need for the Comfort Breathe 1400 in a UK super king?
We suggest at least 3m x 2.9m, and around 3.5m x 3.2m feels more comfortable, leaving space to walk round both sides and open wardrobe doors. If your room is tighter than that, the UK king needs at least 2.7m x 2.9m and gives up 30cm of width, nothing in length.
Is the UK super king worth it over the UK king for a restless partner?
If disturbance is your main complaint, yes. The UK super king is 30cm wider than the UK king and the same length, and that extra distance does more to hide a fidgeter than any comfort layer can. Combined with springs that respond independently, most movement simply never reaches your side.
How much bigger is the UK super king than a double?
Considerably. The UK super king is 45cm wider and 10cm longer than the UK double, which is the difference between negotiating space every night and forgetting your partner is there. It also matches the 180cm footprint of two singles side by side, the width hotel zip and link beds are built on.