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.
- A shared size that fits most rooms: At 135 x 190cm, or 4ft 6in x 6ft 3in, it suits typical UK bedrooms, and we suggest allowing at least 2.6m x 2.8m of floor space.
- Firm support for two: The PostureTech springs vary in tension across the mattress, which means each of you gets pushback matched to your body rather than one uniform feel.
- Room for bedside tables on both sides: The UK double's footprint usually leaves space for a table each, which a UK king often takes away in older rooms.
- Flippable, and manageable at this size: It's double-sided, and owner reviews mention the weight, so the UK double is easier for a couple to turn than the larger sizes.
- Easy to dress: Standard double sheets and a 200 x 200cm duvet are stocked everywhere, so replacing bedding is cheap and simple.
This size suits you if...
You share the bed every night and want a firm, supportive mattress in a size that leaves your bedroom usable, or you sleep alone and like room to stretch out, perhaps with a pet claiming a corner. It also suits a guest room that hosts visiting couples, since the firm feel works for a wide range of sleepers passing through.
Consider another size if...
Two of you share and one is a restless sleeper, because 67.5cm each for two people sharing is snug. The UK king is 15cm wider and 10cm longer; we suggest at least 2.7m x 2.9m for the UK king.
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Is the Sealy Mellbreak Ortho Plus UK double big enough for a couple?
It works for most couples, giving 67.5cm each for two people sharing. That's the traditional UK standard, although if either of you moves a lot in the night or you're both broad shouldered, the extra width of the UK king will feel noticeably calmer. In a smaller bedroom, the UK double is the sensible compromise.
What room size do I need for the Sealy Mellbreak Ortho Plus UK double?
We suggest allowing at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That gives you walking space on both sides and room for bedside tables, which is often where a UK king starts to feel like a squeeze in an older terrace or a compact new build.
Can two people flip the UK double Sealy Mellbreak Ortho Plus easily?
Across verified owner reviews the mattress is described as heavy, and it's double-sided, so it does need flipping to even out wear. At 135 x 190cm the UK double is one of the more manageable sizes for two people to turn; the UK king and UK super king are harder work.
Should I get the Sealy Mellbreak Ortho Plus in a double or a king?
Choose the UK double if your room is close to the 2.6m x 2.8m minimum we suggest, or if you want the widest choice of affordable bedding. The UK king is 15cm wider and 10cm shorter sleepers will appreciate too, being 10cm longer, but it needs a room of at least 2.7m x 2.9m.
Will the Sealy Mellbreak Ortho Plus UK double fit up a narrow staircase?
At 135 x 190cm and 28cm deep, it's a substantial mattress, and it's a sprung construction rather than one that arrives rolled, so measure turning points on stairs and landings before ordering. Owner reviews mention the weight, so plan for two people to carry it up.