Sealy Ortho Plus Bronze Single Mattress
The Sealy Ortho Plus Bronze is an extra firm sprung mattress built for people who want proper orthopaedic support rather than a soft, sink-in feel.
- Extra-firm support
- Stable edges, no roll-off feeling
- Double-sided to spread the wear
£349
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Sealy Ortho Plus Bronze Mattress
More available sizes
Mattress details
Mattress
Sealy Ortho Plus Bronze Mattress
Size
Firmness
Extra Firm
Construction
Foam
Orthopaedic
Depth (cm)
28
Layers
4
Layer Details
Knitted Cover
A soft knitted cover that's breathable, which means heat can escape rather than build up. It helps keep you at an even temperature through the night.
Soft White Fibres
Fibre fillings made from 100% polyester, chosen for recovery and durability. In practice that means the comfort layer springs back rather than flattening quickly.
PostureTech CS Springs with EdgeGuard
The PostureTech Core Support spring system responds to changes in your sleeping position, targeting support where you need it most. Each spring holds an EdgeGuard high-density foam insert, which strengthens the mattress edges and extends the springs' lifespan.
PowerPack Core
The PowerPack at the core works with the PostureTech system to keep your lumbar region comfortable and safely aligned. It's the layer doing the deep support work for your lower back.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- A compact footprint for small rooms: At 90cm wide (3ft x 6ft 3in), it leaves room for a desk or wardrobe in bedrooms where every centimetre counts.
- Easiest size to turn: This mattress is double-sided and needs regular flipping, which is far more manageable in a UK single than in the larger sizes.
- Extra firm support for one: The PostureTech CS springs and PowerPack core give a solo sleeper proper lumbar alignment, which means a firm, stable surface rather than a sink-in feel.
- Usable right to the edge: EdgeGuard foam inserts strengthen the sides, which matters on a 90cm width because you'll naturally sleep closer to the edge.
- Guest room friendly: Two UK singles fit where one big bed dominates, so a spare room can sleep two visitors who'd rather not share.
This size suits you if...
You sleep alone and want extra firm orthopaedic support in the smallest standard adult size, you're setting up a spare room or a study that doubles as guest space, or you're buying for a student room or first flat where the bed frame is a single and only the mattress is down to you.
Consider another size if...
You share the bed, or you're a solo sleeper who likes to spread out beyond 90cm of width. We'd recommend the UK double instead, which is 45cm wider and the same length; allow at least 2.6m x 2.8m of floor space for it.
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FAQ's
Is the Sealy Ortho Plus Bronze in a UK single suitable for a child's room?
It fits the space well: at 90 x 190cm it's the standard children's bed size and leaves floor room for toy storage and a desk. The caveat is firmness. This mattress is rated extra firm, and lighter bodies may find it unyielding at the hips and shoulders, so it suits older, heavier teens better than young children.
Will the UK single Sealy Ortho Plus Bronze fit a bunk or mid sleeper frame?
The width and length match standard single bunk and mid sleeper frames. Depth is the thing to check: at 28cm it's deeper than many mattresses these frames are designed for, and a top bunk needs the guard rail to sit well above the mattress surface. Measure your frame's maximum mattress depth before buying.
What room size do I need for a UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single, which gives you room to walk alongside the bed and open drawers or wardrobe doors. That makes it a realistic fit for box rooms, loft conversions with a narrow usable footprint, and spare rooms that also hold a desk.
Can I turn the single Sealy Ortho Plus Bronze on my own?
More easily than any other size of this mattress. It's double-sided and needs flipping regularly to spread the wear, and at 90cm wide a UK single is light and narrow enough for most people to manage alone. The larger sizes really need two people, so if turning worries you, the single is the practical end of the range.
Is a UK single big enough for an adult?
For one adult, yes: at 90 x 190cm it's the standard UK one-person size, and the EdgeGuard-reinforced sides mean the full width stays usable. Taller sleepers should note the 190cm length; the UK king and UK super king are 10cm longer. To buy, compare the retailers listed on this page, as prices are updated when they change.