Firmness
Type
Pillow Top
Depth (cm)
28
Number of Layers
2
Trial Period (nights)
100
Warranty (years)
5
Price Range
£274 to £534
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
This one makes sense if you want proper firm support without paying a premium for it. The PostureTech springs vary in tension across the mattress, which means firmer pushback where your body is heaviest and gentler give elsewhere, while the soft white fibre comfort layer stops the surface feeling harsh. It's a simple construction, but that simplicity keeps the price down and there's less to go wrong. It's a National Bed Federation Approved Brand, conforms to BS7177 fire safety standards, and the listing states it's 100% recyclable at end of life. If you buy through Mattress Online, they list a 100-night trial and free delivery to most UK locations.
Key Features & what's inside
- 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.
Who's it NOT for?
If you like a soft, sink-in feel, look elsewhere: this is genuinely firm, and lighter side sleepers may find it presses a little on the shoulder. Owner reviews also mention it's heavy, so if you'll struggle to flip a double-sided mattress regularly, factor that in.
Sealy Mellbreak Ortho Plus Mattress
Across 1,458 verified reviews on the Mattress Online product page, it holds a 4.6 rating, with owners describing it as firm and supportive without feeling excessively hard, and several reporting improvements in back discomfort. A few note the weight and that fasteners can protrude slightly.
Is the Sealy Mellbreak Ortho Plus firm or soft?
It's rated firm. That said, the pillow top with soft white fibres softens the surface feel, so owners describe it as supportive without being excessively hard. It suits people who want firm support, particularly those with back issues, less so anyone after a plush, cradling feel.
Can you flip the Sealy Mellbreak Ortho Plus?
Yes. The Mattress Online listing states it's double-sided for flipping, which helps the fillings wear evenly and can extend its useful life. Bear in mind owners say it's heavy, so flipping is easier with two people.
Does the Sealy Mellbreak Ortho Plus come with a trial?
Mattress Online lists a 100-night trial with this mattress. That's the retailer's own offer rather than a Sealy guarantee, so if you buy elsewhere, check that retailer's returns policy before ordering. It's stocked by three retailers.
How deep is the Sealy Mellbreak Ortho Plus?
It's 28cm deep, a generous depth that comes from the pillow top construction. Standard fitted sheets should still work, but if yours are shallow it's worth checking they'll stretch to fit.
What sizes does the Sealy Mellbreak Ortho Plus come in?
Five UK sizes: Single, Small Double, Double, King and Super King, priced from £274 to £534 depending on size and retailer. It comes with a 5 year guarantee.
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