Sealy Ortho Plus Gold Single Mattress
The Sealy Ortho Plus Gold is a firm, double-sided mattress built around Sealy's PostureTech CS springs, which respond to your body weight to give deeper support where you carry the most pressure.
- Extra lumbar support at the centre
- Firm edges, no roll-off feeling
- Double-sided for a longer life
£389
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Sealy Ortho Plus Gold Mattress
More available sizes
Mattress details
Mattress
Sealy Ortho Plus Gold Mattress
Size
Firmness
Firm
Construction
Foam
Memory Foam
Orthopaedic
Depth (cm)
29
Layers
3
Layer Details
Cover
A breathable Belgian damask fabric cover, which means air can move through the sleep surface rather than getting trapped. That helps if you tend to run warm at night.
Comfort Fillings
100% polyester fillings that offer good recovery and durability. In practice that means the comfort layer springs back into shape rather than developing body impressions quickly.
Support System
PostureTech CS springs respond to your body weight, targeting key areas to give deep-down support where you need it most. The springs are twice tempered, a heat treatment that helps them keep their tension over time.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- Firm support for growing sleepers: The PostureTech CS springs give firm, even support, which suits teens moving up from a childhood mattress and adults who sleep on their back.
- A compact footprint that leaves room to live: At 90cm wide it leaves floor space for a desk, wardrobe and toy storage in a child's room, or two beds plus a walkway where siblings share.
- Turnable, so it lasts through the teenage years: Being double-sided means you can flip it to even out wear, useful for a mattress a child may sleep on for a decade.
- Firm edges in a narrow bed: EdgeGuard, a high-density foam strip around the springs, firms the sides, which matters more on a 90cm mattress where the edge is never far away.
- Cheap, easy bedding: Standard single sheets and a single duvet fit, and they're the most widely stocked and least expensive bedding of any UK size.
This size suits you if...
You're buying for a child's or teenager's room where the bed shares space with a desk and wardrobe, you're kitting out a spare room or study that occasionally hosts guests, or you sleep alone and prefer a firm, traditional sprung feel over memory foam. It also suits student rooms and first flats where you need a solid one-person mattress on a provided frame.
Consider another size if...
You're an adult who spreads out in your sleep, or the bed will ever be shared. We'd recommend the UK small double instead, which is 30cm wider and the same length; allow at least 2.4m x 2.8m for it.
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FAQ's
Is the Sealy Ortho Plus Gold UK single suitable for a bunk or mid sleeper frame?
Check your frame's maximum mattress depth first. The Ortho Plus Gold is 29cm deep, which is taller than many bunk and mid sleeper guard rails allow, so measure from the base to the top of the rail before buying. It's also double-sided and hand-tufted, so flipping it on a raised frame takes two people.
How much space does a UK single need in a small bedroom?
We suggest at least 2.1m x 2.8m of floor space for a UK single, which covers the 90 x 190cm mattress plus room to walk and open drawers. That makes it a practical fit under the slope of a loft conversion or in a box room where a wider bed simply wouldn't work.
Is a UK single Sealy Ortho Plus Gold big enough for an adult?
For one adult, yes, provided you don't sprawl. At 90cm wide and 190cm long it's the standard UK one-person size, and the firm PostureTech CS springs support adult weight well. Taller sleepers should note the UK king and UK super king are 10cm longer, though both need a much bigger room.
Is the single version of the Ortho Plus Gold a good guest bed?
It's a sensible choice for a spare room, particularly one doubling as an office where floor space is tight, and two UK singles can fit where one double dominates the room. The firm feel divides opinion less for occasional use, and the polyester fillings recover well between visits rather than developing impressions.
What bedding do I need for the Sealy Ortho Plus Gold single?
Standard UK single fitted sheets and a single duvet, which is 135 x 200cm. One thing to check: this mattress is 29cm deep, so look for fitted sheets with a deep enough wall, ideally 30cm or more, or they'll ping off the corners overnight.