Last seen for £229 at Mattress Man on 10th November 2026
Silentnight Miracoil Sleep Single Mattress
The Silentnight Miracoil Sleep Mattress is a medium firm sprung mattress built around Silentnight's Miracoil spring system, which means a supportive, slightly firmer feel that suits back and front sleepers well.
- Suits back & front sleepers
- Support spread across the mattress
- Easy care, only needs rotating
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 £299 at Mattress Man on 27th October 2026
Last seen for £349 at Mattress Man on 10th November 2026
Last seen for £425 at Mattress Man on 27th October 2026
Last seen for £299 at Mattress Man on 10th November 2026
Last seen for £229 at Mattress Man on 10th November 2026
Mattress details
Mattress
Silentnight Miracoil Sleep Mattress
Size
Firmness
Medium Firm
Construction
Open Coil Spring
Depth (cm)
Layers
Layer Details
Key benefits
- Fits the smallest bedrooms: At 90cm wide it leaves floor space free in a child's room where the bed competes with a desk, wardrobe and toy storage.
- Sensible for growing sleepers: The medium firm Miracoil feel gives firmer spinal support, which means a surface that holds up well as a child grows into a teenager.
- Works in shared rooms: Two UK singles plus a walkway fit where one larger bed would dominate, a practical setup for siblings sharing.
- A safe pick for guest rooms: The slightly firmer feel suits occasional use and a mix of guests, and across verified owner reviews satisfaction is high for the price.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm single duvet fit, the most widely stocked and affordable bedding of any UK size.
This size suits you if...
You're buying for a child's room or a teenager and want a supportive, medium firm mattress from a familiar brand at the affordable end of the range, you need a guest bed for a spare room that doubles as an office, or you're a single adult in a compact room, a first flat or student housing where 90cm of width is all the space allows.
Consider another size if...
You're an adult who sleeps diagonally, shares the bed occasionally, or simply feels hemmed in at 90cm wide. The UK small double is 30cm wider at the same length, and we suggest at least 2.4m x 2.8m of floor space for it.
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FAQ's
Is the Silentnight Miracoil Sleep Mattress UK single good for a child's bedroom?
Yes, it's a natural fit. The medium firm Miracoil spring feel gives the firmer support that suits children and teens, and the 90 x 190cm footprint leaves room for a desk and storage in a typical child's bedroom. Very light sleepers may find it slightly firm on their side, but for growing backs that firmness is generally a plus.
What room size do I need for a UK single Silentnight Miracoil?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single, which is our own guidance rather than Silentnight's. The mattress itself is 90 x 190cm, so it also suits awkward spaces like a loft conversion where only a narrow footprint fits under the slope.
Will the UK single Silentnight Miracoil fit a bunk bed or mid sleeper?
The 90 x 190cm footprint matches standard UK bunk and mid sleeper frames, so width and length are fine. Depth is the thing to check: raised frames usually need a mattress below their guard rail limit, and Silentnight doesn't publish a depth for this mattress, so ask the retailer before buying for a bunk.
Is a UK single big enough for an adult on this mattress?
For one average-sized adult, yes, though 90cm of width is snug if you move around a lot in the night. The medium firm feel suits back and front sleepers, so a single adult in a compact room or first flat should be comfortable. If you'd like more spreading room, the UK small double is 30cm wider.
Should I choose the single or small double Silentnight Miracoil for a spare room?
If the spare room doubles as an office, the UK single keeps more floor free for a desk and hosts one guest comfortably. The UK small double is 30cm wider at the same length and copes better with couples staying over, but we suggest at least 2.4m x 2.8m of floor space for it.