Sealy Mellbreak Ortho Plus Small Double Mattress
The Sealy Mellbreak Ortho Plus is a firm pillow top mattress, 28cm deep, built around Sealy's PostureTech Core Support Springs, which use varied tensions to support your whole body rather than pushing back evenly everywhere.
- Firmer pushback where you're heaviest
- Soft fibre top, no boardy feel
- 100% recyclable at end of life
£374
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Sealy Mellbreak Ortho Plus Mattress
More available sizes
Mattress details
Mattress
Sealy Mellbreak Ortho Plus Mattress
Size
Firmness
Firm
Construction
Open Coil Spring
Depth (cm)
28
Layers
2
Layer Details
Comfort Layer
Soft white synthetic fibres sit on top, which means a cosy surface feel rather than the boardy firmness you might expect from an ortho mattress. They're durable and resilient, so the layer should hold its shape rather than flattening quickly.
Support System
PostureTech Core Support Springs use unique shapes and varied tension, which means the mattress responds differently to your hips than to your shoulders, giving full-body support with pressure relief where you need it. A PowerPack filling in the centre zone adds targeted lumbar support.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- Firm support with room to move: The UK small double is 30cm wider than the UK single, which means you can change position freely without the varied-tension springs losing contact with your body.
- Fits rooms a double overwhelms: At 15cm narrower than the UK double, this size leaves walking space in box rooms and studio flats; we suggest a room of at least 2.4m x 2.8m.
- Lumbar support for one: The PowerPack centre-zone filling sits directly under a solo sleeper's lower back, so the extra lumbar support does its job however you position yourself across the width.
- Easier to flip at this width: This is a double-sided mattress, and owner reviews mention it's heavy, so the 4ft width makes regular flipping more manageable than in larger sizes.
- Standard 4ft bedding: Small double is a standard UK size, so fitted sheets are easy to find and a regular double duvet drapes generously over the 120cm width.
This size suits you if...
You sleep alone and have outgrown a single but your room can't take a full double, you're furnishing a compact guest room or holiday let second bedroom where couples stay occasionally rather than nightly, or you're downsizing and the bed has to suit the new room's footprint. In each case you want firm, orthopaedic-style support rather than a soft, sink-in feel.
Consider another size if...
You share the bed every night, because 120cm is tight for two adults long term, particularly on a firm surface where you can't sink towards the middle. We'd recommend the UK double instead, allowing a room of at least 2.6m x 2.8m.
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FAQ's
Is a small double Sealy Mellbreak Ortho Plus big enough for a couple?
For the odd night, yes. At 120 x 190cm it will take two adults for occasional guest room stays, and the firm surface stops you rolling into each other. For nightly sharing it's a squeeze: the UK double is 15cm wider at the same length, which makes a real difference over months of use.
What size room do I need for a small double Mellbreak Ortho Plus?
We suggest a room of at least 2.4m x 2.8m. That leaves enough clearance to walk round the bed and, usefully with this mattress, enough space to flip it. It's double-sided and owner reviews describe it as heavy, so a little manoeuvring room matters more than it would with a one-sided design.
How does the small double compare to the single in this mattress?
The UK small double is 30cm wider than the UK single, and the two are the same length at 6ft 3in. The support system is identical, so you're paying for width rather than a different feel. For a teenager who's outgrown a single, or an adult who spreads out, that extra width is the whole point.
Is the Sealy Mellbreak Ortho Plus small double hard to flip on your own?
It's more manageable than the larger sizes. Owner reviews mention the mattress is heavy, and it needs flipping regularly to even out wear because it's double-sided. The 4ft width helps, but if you have limited strength or a very tight room, ask someone to help the first few times.
What bedding fits this size of the Mellbreak Ortho Plus?
You'll need small double (4ft) fitted sheets, and check they state a depth of 28cm or more, since shallow sheets will ping off the corners of this mattress. A standard double duvet works well on top and hangs generously over the sides. Small double is a standard UK size, so sheets are easy to find.