The Sealy Mellbreak Ortho Plus Mattress is a firm, turnable spring mattress that suits an average-weight back sleeper with the bed to themselves better than anyone else. Skip it if you sleep on your side or share with a partner who fidgets. Inside, Sealy's PostureTech springs and a PowerPack centre zone sit under tufted fibres on both faces. I find Sealy bland and its naming exhausting, but of the two firm Ortho Plus models this is the more sensible one for most people.
It used to be extra firm, and now it's Firm
If you knew this listing as the Sealy Posturepedic Backcare Extra Firm, the bed on sale now is a grade softer: Mattress Online rates the Mellbreak Firm. It has also gone from one sleeping side to two, and the listing gives a depth of 28cm, a few centimetres more than the old spec sheet did. Somebody at Sealy loves a rename.
The confusing part is the description, which still calls the Mellbreak the firmest mattress in Sealy's Ortho Plus collection while the Steeple Ortho Plus on the same site is graded Extra Firm. Go by the grade, not the sentence, and if you need it properly hard, the Steeple is the one graded for that.
Tufted on both faces, so you flip it as well as spin it
PostureTech Core Support springs are Sealy's own twist on open coil, wired as one unit instead of sewn into separate pockets. Sealy says they get gradually firmer as more of your weight presses on them, and the PowerPack filling in the centre zone gives the lower back extra resistance. Ignore the badge and you have a firm spring bed with a stiffer middle, which is a perfectly decent thing to own.
The top is soft synthetic fibre under a damask cover, tufted through on each side, and four handles sit in the border. Sealy wants it flipped every few months. I'm all for that: two faces sharing the work means each one takes longer to dip. At 29kg for a double it's manageable for two adults, and a squabble for one.
Back sleepers of average weight, on their own
Position is the deciding factor on this bed. A back sleeper of ordinary build gets a flat, supportive surface with enough fibre on top to stop it feeling like the floor. My partner sleeps on their back or front and is exactly who this is aimed at. I'm a side sleeper, and I'd find it pushes back at my shoulder.
Avoid it if you're a side sleeper under about nine stone, if you're over about eighteen stone and want to see a wire gauge before you buy, which Sealy doesn't publish, or if the person beside you turns over all night. One owner swapped theirs for a pocket-sprung mattress for exactly that reason.
Firm enough for some owners, too firm for others
Some of the older reviews are for the earlier model, the extra firm one, so read the recent reviews when you judge the grade. Those split. Some found it too hard, and a couple bought a topper to make it bearable, while others wanted it firmer than it is. That split is the complaint that keeps coming back, and it wouldn't put me off on its own, because it tells you more about the owners' weights than about the springs. The one-offs are worth knowing too. One owner can feel the tufting buttons when rolling onto them, and a few say their back got worse rather than better.
Before you buy, check the returns route. Mattress Online's comfort trial is an exchange for another mattress, not a refund, and it only applies if you buy their mattress protector at the same time.
What to buy instead
Want the same firm feel with memory foam on top? Mattress Online points to the Eaglesfield Ortho Plus, a firm model in the same range. Mattress Online has since regraded it as firm, and this review has been updated to match. For a firm bed that keeps a restless partner on their own side, the Hypnos Marlow Ortho Deluxe at the same retailer costs a good deal more, and the extra buys pocket springs, natural fillings and a better-made turnable mattress.
