Last seen for £348 at Mattress Online on 2nd September 2026
Silentnight Moretto Miracoil King Size Mattress
The Silentnight Moretto Miracoil is listed as a soft mattress, which means it should feel gentle and cushioning rather than firm underneath you.
- Soft feel suits side sleepers
- Cushions shoulders & hips
- An eco-friendly choice
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
More available sizes
Last seen for £348 at Mattress Online on 2nd September 2026
Last seen for £298 at Mattress Online on 25th June 2026
Last seen for £424 at Mattress Online on 25th June 2026
Last seen for £298 at Mattress Online on 25th June 2026
Last seen for £224 at Mattress Online on 25th June 2026
Mattress details
Mattress
Silentnight Moretto Miracoil Mattress
Size
Firmness
Soft
Construction
Open Coil Spring
Eco-Friendly
Depth (cm)
Layers
Layer Details
Key benefits
- Proper personal space for couples: At 75cm each for two people sharing, you can both settle into the soft surface without drifting into each other's half.
- Length for taller sleepers: The UK king is 10cm longer than the UK double, so anyone approaching six foot stops negotiating with the footboard.
- Less partner disturbance: If one of you leaves for work hours before the other, the extra width puts useful distance between an early alarm and a sleeping partner.
- A soft feel that suits sharing wide: Soft mattresses cushion shoulders and hips, which side sleepers tend to like, and the king's width means you both get room to sink in comfortably.
- Room to shift position: During pregnancy or recovery from surgery, when you're propping pillows and changing position through the night, 150cm of width is genuinely easier to manage.
This size suits you if...
You share the bed every night and a UK double has started to feel cramped, you sleep on your side and want a soft mattress with enough width for two, or one of you is tall enough that the 200cm length is the real draw. It also suits couples on mismatched schedules who want fewer disturbances when one gets up early.
Consider another size if...
Your bedroom is smaller than our suggested minimum of 2.7m x 2.9m for a UK king, or you need any other size at all. This mattress is sold in the UK king only, so a single, double or super king means a different model.
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FAQ's
Is a UK king a good size for couples on a soft mattress?
Yes, arguably more so than on a firmer bed. Soft mattresses let you sink in, and on a narrower size that can mean rolling toward a partner. The UK king's 150cm width, 75cm each for two people sharing, gives each of you space to settle without meeting in the middle.
Will the Silentnight Moretto in a UK king fit my bedroom?
The mattress measures 150 x 200cm, or 5ft x 6ft 6in. We suggest a room of at least 2.7m x 2.9m so you can walk round both sides and open drawers. In a new build master, measure after accounting for wardrobes; these rooms often feel smaller once furniture is in.
Is the UK king long enough for someone over six foot?
At 200cm, the UK king is 10cm longer than the UK double, and for taller sleepers that length is often the real reason to upgrade. If your feet currently hang off a 190cm double, this size fixes it without needing a bigger room than a UK super king would demand.
Does the Silentnight Moretto Miracoil come in a super king?
No. This mattress is currently listed in the UK king only. If you want the extra room of a UK super king, which is 30cm wider than the UK king and the same length, you'd need a different model, and you'd want a room of at least 3m x 2.9m for it.
Where can I buy the Silentnight Moretto in a UK king?
Availability for this model is limited, so the simplest route is to compare the retailers listed on this page. The prices shown here are updated as retailers change them, which matters for a model with narrow distribution where stock can move quickly.