Silentnight Lift Breathe King Size Mattress
The Silentnight Lift Breathe is a medium hybrid mattress designed with menopause symptoms in mind, pairing a cooling, breathable build with 1600 Mirapocket® pocket springs.
- Moves heat & moisture away
- Zoned support that adapts to you
- 60-night trial & 5-year guarantee
£778
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Silentnight Lift Breathe Mattress
More available sizes
Mattress details
Mattress
Silentnight Lift Breathe Mattress
Size
Firmness
Medium
Construction
Pocket Spring
Hybrid
Depth (cm)
31
Layers
3
Layer Details
Intense™ sleep surface
The top surface, which Silentnight states is scientifically proven to reduce cortisol levels and morning stress brought on by the menopause. In practice, this is the layer aimed at calmer, less disrupted mornings.
Breathable Sleep System
A layer designed to reduce night sweats by enhancing breathability and moving heat and moisture away from your body. If you tend to sleep hot, this is the part of the build doing the heavy lifting for you.
Mirapocket® springs
1600 individual pocket springs that adjust to your body weight, giving zoned, tailored support. Each spring moves independently, which means less motion transfer if you share a bed.
Layer details from silentnight.co.uk product page, September 2026.
Key benefits
- Proper personal space: At 75cm each for two people sharing, you can change position freely, which helps if disturbed sleep is the reason you're shopping.
- Cooling works better with room to spread: The Breathable Sleep System moves heat and moisture away from your body, and the wider surface means less shared body heat to fight in the first place.
- Less partner disturbance: The 1600 Mirapocket springs move independently, so an early alarm on one side transfers less across a 150cm width than it would on a smaller mattress.
- Length for taller sleepers: The UK king is 10cm longer than the UK double, a real difference for anyone approaching six foot whose feet reach the end of a 190cm mattress.
- A medium feel across the full width: The zoned springs adjust to each sleeper's weight separately, so two people of different builds each get support suited to them rather than a compromise.
This size suits you if...
You share the bed every night and a double feels cramped, especially if one of you sleeps hot or wakes often and needs space to shift without disturbing the other. It also suits couples where one partner is on a different schedule, or anyone over six foot who keeps finding their feet at the edge of a 190cm mattress.
Consider another size if...
Your bedroom falls short of the 2.7m x 2.9m we suggest for a UK king. In that case we'd recommend the Silentnight Lift Breathe in a UK double instead, which needs at least 2.6m x 2.8m.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
Is the Silentnight Lift Breathe UK king good for couples?
Yes, and arguably it's the size where this mattress makes most sense for two. You get 75cm each for two people sharing, and the 1600 pocket springs respond to each of you independently, so a partner turning over or getting up early sends less movement across the bed.
What room size do I need for the Silentnight Lift Breathe in a UK king?
We suggest at least 2.7m x 2.9m so you can open drawers and walk round the bed comfortably. That's our guidance rather than Silentnight's. If your room is tighter than that, the UK king will dominate it, and the UK double may be the more liveable choice.
Is the UK king long enough if my partner is over six foot?
At 200cm, or 5ft x 6ft 6in in old money, the UK king is 10cm longer than the UK double. For anyone around the six foot mark, that length is often the upgrade that matters more than the width, keeping feet on the mattress rather than hanging off it.
Does the cooling work better in the king size?
The Breathable Sleep System itself is the same in every size. What changes is how much you benefit: with 75cm each, you're less likely to be pressed against a partner's body heat, so if night sweats are your main complaint, the extra width supports what the mattress is trying to do.
Where can I compare prices on the Silentnight Lift Breathe UK king?
Prices vary between retailers and change often, so we don't quote figures here. Compare the retailers listed on this page instead; the prices shown are updated as retailers change them, which makes it a reliable snapshot of what the UK king costs right now.