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.
- Real distance from a restless partner: With 90cm each for two people sharing, movement on one side fades before it reaches the other, and the firm springs transfer less motion than softer builds.
- Room for the whole household: When children or a large dog treat your bed as theirs, the extra width means the adults still get a fair share of the mattress.
- Firm support across the full width: The PostureTech springs vary their tension to your body, so two sleepers of different weights each get appropriate pushback rather than a compromise.
- Double-sided, so wear evens out: You can flip it to spread wear across both surfaces, which matters at this size where each sleeper tends to stick to their own half.
- 30cm wider than the UK king: Same 200cm length as the UK king, but the extra width is where the difference lives: it's the gap between comfortable and genuinely undisturbed.
This size suits you if...
You share the bed every night and want enough width that neither of you notices the other, your children or pets regularly join you and a UK king has started to feel crowded, or you simply have a large master bedroom where a smaller mattress would look lost. Allow at least 3m x 2.9m of floor space so the room still functions around it.
Consider another size if...
Your bedroom is under the 3m x 2.9m we suggest for this size, or you'd struggle to flip a mattress this large on your own. We'd recommend the UK king instead: it's 30cm narrower, the same length, and we suggest at least 2.7m x 2.9m 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.
What room size do I need for the Sealy Mellbreak Ortho Plus super king?
We suggest at least 3m x 2.9m. The mattress itself is 180 x 200cm, and you need walking space on both sides plus clearance for wardrobe doors and drawers. In a loft conversion, check the sloping ceiling too: at this width the bed may only fit against one wall, which decides your whole layout.
Is the Sealy Mellbreak super king hard to flip?
It takes two people, realistically. This is a double-sided mattress designed to be flipped to even out wear, and owner reviews of the Mellbreak mention it's heavy even in smaller sizes. At 180cm wide, flipping it solo isn't practical, so factor in a helper or accept less frequent turning.
How much space does each person get on the super king Mellbreak?
90cm each for two people sharing, the same width per person as a UK single. On a firm mattress like this, that spacing matters: the PostureTech springs already limit motion transfer, and the extra distance does the rest, so a restless partner becomes far easier to sleep through.
Will the Sealy Mellbreak Ortho Plus super king get upstairs?
Measure your stairwell and landing turns before ordering. This is a heavy, 28cm-deep sprung mattress that won't fold or compress, so tight turns and low banisters are the usual sticking points. Check door swings in the bedroom too, since a 180 x 200cm mattress changes where furniture can go.
Should I get the Mellbreak in a UK king or super king?
Both are 200cm long, so the choice is purely about width: the UK super king is 30cm wider. If children or pets join you regularly, or one of you sleeps restlessly, the extra width is what solves it. If your room is under 3m x 2.9m, take the UK king.