Mattress Online Classic Gold Ortho Super King Mattress
The Classic Gold Ortho is Mattress Online's entry-level orthopaedic model, built around traditional open coil springs with a soft fibre comfort layer on top.
- Helps keep your spine aligned
- Breathable cover for warm sleepers
- 100-night trial
£314
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Mattress Online Classic Gold Ortho Mattress
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Mattress details
Mattress
Mattress Online Classic Gold Ortho Mattress
Size
Firmness
Medium Firm
Construction
Orthopaedic
Open Coil Spring
Depth (cm)
26
Layers
3
Layer Details
Comfort Layer
Soft white synthetic fibres sit at the top, which means a cosy initial feel rather than a firm, flat surface. They're durable and resilient, designed to hold their shape over time.
Support System
Traditional open coil springs are interlaced and joined in a lattice design, which means your weight is distributed evenly across the bed. That helps relieve built-up pressure and supports spinal alignment, the core job of an orthopaedic mattress.
Cover
A knitted cover gives a soft, warm finish. It also enhances airflow and is breathable, which helps if you run a little hot at night.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- 90cm each for two sharing: Two people get 90cm each, so a partner who turns over a lot becomes far easier to sleep through on an open coil bed.
- Distance offsets motion transfer: Open coils pass on more movement than pocket springs, which means the extra width does real work here, putting a restless sleeper further out of range.
- Room for the whole household: When a child wanders in at 3am, or the dog treats the bed as theirs, there is still a fair share of mattress left for the adults.
- Firm support across the full width: The interlaced lattice of springs spreads weight evenly, so the medium firm feel stays consistent right to the edges of that 180cm surface.
- Big bed, modest outlay: This is the entry level model in the range, so you get maximum sleeping space without the price a super king usually commands.
This size suits you if...
You share the bed every night and one of you moves around enough to wake the other, or children and pets regularly join you and a UK king has started to feel crowded. Your bedroom measures at least 3m x 2.9m, ideally more, and you want firm, no-frills support at this size rather than a plush finish.
Consider another size if...
Your room is under 3m x 2.9m, or you sleep alone and would rattle around in 180cm of width. We'd recommend the UK king instead: it's 30cm narrower, the same length, and needs a room of at least 2.7m x 2.9m.
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FAQ's
Is the Classic Gold Ortho super king good for couples who disturb each other?
Yes, and arguably it needs the size. Open coil springs transfer more movement than pocket springs, so on a smaller mattress you'd feel a partner turning over. At 180cm wide, with 90cm each, most of that movement happens too far away to wake you. It's the size we'd suggest for restless pairs on this model.
Will the Classic Gold Ortho super king fit in my bedroom?
We suggest a room of at least 3m x 2.9m, and that's our guidance rather than the brand's. Measure with the door swing and any wardrobes in mind, and check the route up: at 180 x 200cm, tight landing turns and narrow staircases catch people out more often than the room itself.
Is the super king Classic Gold Ortho worth it over the UK king?
If two of you share with children or pets in the mix, usually yes. The UK super king is 30cm wider than the UK king and the same length, which works out at 15cm more space each. Because open coils carry movement across the bed, that extra distance does more here than it would on a pocket sprung mattress.
Can children or a dog share this size comfortably?
This is the size for it. With 180cm of width, a child climbing in at night or a large dog settling at the foot still leaves both adults a workable share. The medium firm, evenly supported surface also holds its shape under an extra small body better than a soft, sinking mattress would.
Who shouldn't buy the Classic Gold Ortho in a super king?
Solo sleepers rarely need this much bed, and anyone with a room under our suggested 3m x 2.9m will find it dominates the space. Lightweight side sleepers may find the medium firm feel a little solid at any size, so that concern isn't solved by going bigger. For most solo buyers, the UK double gives 67.5cm each for two sharing anyway.