Sealy Mellbreak Ortho Plus Mattress
Mattress
Sealy Mellbreak Ortho Plus Mattress
Size
Firmness
Construction
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.
- Fits where space is tight: At 90cm wide it leaves room for a desk, wardrobe and storage in a child's or teenager's bedroom without the bed dominating the floor.
- Firm support for growing sleepers: The PostureTech springs vary in tension across the mattress, which means teenagers and single adults get proper spinal support rather than a uniform pushback.
- Easier to flip in this size: It's double-sided and owner reviews across sizes mention the weight, but the UK single is the lightest in the range and the most manageable to turn regularly.
- Practical for guest rooms: Two UK singles suit a spare room that hosts different guests, and standard single bedding is the cheapest and easiest to keep spares of.
- Lumbar support at a sensible size: The PowerPack centre-zone filling gives extra lower back support, which suits a single adult who wakes with an aching back.
This size suits you if...
You're buying for a child's or teenager's room where the bed shares floor space with a desk and storage, you're a single adult who sleeps alone and wants firm orthopaedic-style support, or you're kitting out a spare room, student let or first flat where the frame is a standard UK single. It also suits a loft room where only a narrow footprint fits under the slope.
Consider another size if...
You're an adult who spreads out in the night or finds 90cm restrictive. We'd recommend the UK small double instead: it's 30cm wider than the UK single, the same length, and we suggest at least 2.4m x 2.8m of floor space for it.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
Will the Sealy Mellbreak Ortho Plus single fit a bunk bed or mid sleeper?
The width matches standard UK single frames, but check depth carefully. This mattress is 28cm deep, which is on the deeper side for raised frames, where a guard rail needs to sit well above the mattress surface. Check your frame's maximum mattress depth before buying; many bunks specify a lower limit than 28cm.
Is the Sealy Mellbreak Ortho Plus single suitable for a child?
It can be, with one caveat. This is a genuinely firm mattress, and lighter bodies sink in less, so a young child may find it firmer still. For older children and teenagers who benefit from proper spinal support as they grow, the varied-tension springs are a sensible fit. For younger, lighter children, consider whether firm is what they need.
How much room do I need for a UK single Sealy Mellbreak?
The mattress itself is 90 x 190cm, and we suggest allowing at least 2.1m x 2.8m of floor space so there's room to walk alongside and open drawers or wardrobe doors. That makes it workable in box rooms, lofts with a narrow flat section, and children's rooms where a desk shares the space.
Is the single big enough for an adult?
For most single adults, yes: 90cm is the standard UK one-person width and 190cm suits anyone up to around that height. If you're tall, restless or simply used to more space, the UK small double is 30cm wider and the same length, so it fits many of the same rooms with more sprawl room.
Can one person flip the single size on their own?
More easily than the larger sizes. The Mellbreak is double-sided and needs flipping to even out wear, and owner reviews mention the range is heavy, but at 90cm wide the UK single is the most manageable version. One reasonably able adult should cope; it's the UK double and up where you'd want a second pair of hands.