Silentnight Double Sided Miracoil Double Mattress
The Silentnight Double Sided Miracoil is a straightforward sprung mattress from one of the UK's best-known bedmakers.
- Zoned support for hips & shoulders
- Breathable fibres keep you cooler
- Double-sided to even out wear
£203
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Silentnight Double Sided Miracoil Mattress
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Mattress details
Mattress
Silentnight Double Sided Miracoil Mattress
Size
Firmness
Medium Firm
Construction
Open Coil Spring
Depth (cm)
24
Layers
3
Layer Details
Cover
A soft knitted cover that is highly breathable, which means less heat trapped at the surface. It feels soft to the touch rather than stiff or papery.
Comfort Fillings
Air Plus fibres, breathable comfort fibres that encourage airflow through the mattress. In practice that helps keep the sleep surface feeling fresher through the night.
Support System
Silentnight's Miracoil spring system, a zoned open coil unit designed to support all parts of the body with individual sleeping zones. The no roll-together design means you are less likely to drift into your partner's side.
Base Note
The mattress is double sided, so you can flip it to even out wear over time. It arrives flat rather than rolled and boxed, which spares the springs any compression.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- Built for sharing at this width: At 67.5cm each for two people sharing, the no roll-together spring design matters here, keeping you on your own side rather than drifting into the middle.
- Fits most UK bedrooms: We suggest allowing at least 2.6m x 2.8m, which most standard doubles and terraced bedrooms can manage with space for bedside tables on both sides.
- Flippable, and easier flipped by two: The double sided build lets you turn it to even out wear, and in a UK double there are usually two of you to share the lifting.
- Airflow where two bodies share: Air Plus fibres in the comfort layer encourage airflow, which helps when a shared 135cm surface generates more warmth than a solo sleeper would.
- Easy to dress: Standard double sheets and a 200 x 200cm duvet fit, sold everywhere at every price point, so a guest room set costs very little to complete.
This size suits you if...
You share the bed every night and your room sits around the typical UK size, where a UK king would crowd the walkways. It also suits a guest room that regularly hosts visiting couples, since it sleeps two without demanding a large spare room. Solo sleepers who want space to stretch out, or who share with a dog claiming a corner, will find it generous without feeling excessive.
Consider another size if...
You and your partner are both broad-shouldered or restless, because 67.5cm each can feel snug night after night. If your room allows at least 2.7m x 2.9m, we'd recommend the UK king instead, which is 15cm wider and 10cm longer.
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FAQ's
Is the Silentnight Double Sided Miracoil in a UK double big enough for a couple?
For most couples, yes. You each get 67.5cm of width, and the Miracoil system's no roll-together design helps you stay on your own side, which matters more at this size than on a wider bed. If either of you is particularly broad or an active sleeper, the UK king adds 15cm of width and 10cm of length.
Will the UK double fit my bedroom with bedside tables on both sides?
Usually. We suggest allowing at least 2.6m x 2.8m for a UK double, and around 3m x 3m is the comfortable norm. At 135cm wide, this mattress leaves room in most standard UK bedrooms for a table each side and a walkway, where a UK king often forces you to choose between them.
Is the UK double Miracoil easy to get up narrow stairs?
It needs more thought than a boxed mattress. This model arrives flat rather than rolled, which spares the springs compression but means manoeuvring a full 135 x 190cm mattress around turning stairs in older terraces or tight new build landings. Measure your stairwell and any awkward corners before ordering, and have two people ready on delivery day.
Would the UK small double be enough instead of the double?
It depends who sleeps in it. The UK double is 15cm wider than the UK small double, and the two are the same length. For a couple sleeping in it every night, that extra width is well worth having. For a solo sleeper in a tight room, the UK small double would suit you, and we suggest allowing at least 2.4m x 2.8m for it.
Is this a good guest room mattress in a UK double?
It's a sensible choice. The UK double sleeps visiting couples comfortably, the medium-firm feel suits most back and front sleepers, and the double sided design means occasional use spreads wear evenly when you flip it. Compare the retailers listed on this page, as the prices shown here are updated as retailers change them.