Silentnight Miracoil Ortho Mattress
Mattress
Silentnight Miracoil Ortho Mattress
Size
Firmness
Construction
Depth (cm)
24
Layers
2
Layer Details
- Eco Comfort Fibres. A comfort layer made with Silentnight's Eco Comfort fibres, partially made from recycled plastic including bottles. It is breathable, helps regulate temperature and reduces moisture build-up, which means you should feel less clammy overnight.
- Miracoil® springs. Silentnight's Miracoil® support system gives zoned support where your body needs it most, so heavier areas like your hips get firmer resistance. It also supports right to the edge of the bed and is designed to limit partner disturbance when one of you moves.
Layer details from silentnight.co.uk product page, September 2026.
- Fits where other sizes can't: At 90cm wide, it slots into loft conversions and box rooms where the bed has to share space with a desk and wardrobe.
- Firm support for growing bodies: The zoned Miracoil spring system gives firm resistance under the hips, which means a child or teen sleeps level rather than curled into a dip.
- Edge-to-edge usable space: Silentnight says the springs support right to the edge, so all 90cm of width is usable, which matters more on a single than any other size.
- Sensible for spare rooms: In a room doubling as an office, a UK single leaves the floor space a desk needs while still giving guests firm, uncomplicated support.
- Cheap, easy bedding: Single sheets and a 135 x 200cm duvet fit, and both are the most widely stocked and affordable bedding of any UK size.
This size suits you if...
You're buying for a child or teenager who needs firm support in a room where the bed competes with toys, a desk and a wardrobe. Or you're kitting out a spare room that spends most of its life as an office, or a student room where the frame is provided and the mattress isn't. A single adult in a compact bedroom will also find the 90cm width workable, provided you like a firm feel.
Consider another size if...
You're an adult who moves around at night, because 90cm leaves little margin on either side. We'd recommend the UK double instead, which is 45cm wider and the same length; allow at least 2.6m x 2.8m of floor space for it.
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Will the Silentnight Miracoil Ortho UK single fit a bunk bed?
Bunk, cabin and mid-sleeper frames take standard UK single mattresses, so the 90 x 190cm footprint fits. The one thing to check is depth: this mattress is 24cm deep, and raised frames often specify a maximum so the guard rail still sits above the mattress. Measure your frame's limit before ordering.
Is the Miracoil Ortho UK single a good mattress for a child?
The firm, zoned springs suit growing children and teens well, keeping the spine level rather than letting it sink. One caution: very light children may find it a little unyielding at first, as lighter bodies don't press far into a firm surface. For most kids' rooms and bunks, it's a sound, hard-wearing choice.
What room size do I need for a UK single mattress?
We suggest at least 2.1m x 2.8m of floor space, which is our own guidance rather than Silentnight's. That allows room to walk alongside the bed and open drawers or a wardrobe. In practice a UK single fits almost any UK bedroom, including box rooms and the narrow footprint under a loft conversion's slope.
Is the UK single long enough for a tall teenager?
At 190cm (6ft 3in) long, it suits most teens and adults comfortably. Anyone approaching six foot will start to feel the limit, though. The UK king is 10cm longer as well as 60cm wider, so if length is the real concern and the room allows, sizing up is the better fix than persevering.
Can an adult sleep on a Miracoil Ortho single every night?
Yes, if you sleep fairly still and like a firm feel. The edge-to-edge spring support helps here, since you can use the full 90cm width without the sides feeling soft. Restless sleepers or lightweight side sleepers may struggle, the former with space, the latter with pressure on shoulders and hips.