Sealy Ortho Plus Silver Memory Mattress
The Sealy Ortho Plus Silver Memory Mattress pairs a memory foam comfort layer with Sealy's PostureTech CS spring system, which means you get body-shaping pressure relief on top with responsive support underneath.
- Memory foam eases pressure points
- Support that follows how you move
- Firmer edges for sitting & dressing
£359
Get the lowest price we've found
The Sealy Ortho Plus Silver Memory Mattress is rated Medium Firm, a feel that suits most back and combination sleepers, although lightweight side sleepers may find it a little firm. It's 25cm deep and sits at the affordable end for a sprung memory foam mattress from an established name. Sealy is an NBF-Approved Manufacturer, and the mattress carries a five-year manufacturer guarantee. One thing to know: it's delivered flat rather than rolled and boxed, so allow for access through doorways and stairwells.
Mattress specifications
Firmness
Medium Firm
Type
Memory Foam
Depth (cm)
25
Number of Layers
2
Trial Period (nights)
Warranty (years)
5
Price Range
£359 to £629
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
BS 7177
Assessed from the specification published by MattressNextDay, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
This mattress makes sense if you want orthopaedic-leaning support without giving up the cushioned, cradled feel of memory foam. The MemorySense foam layer relieves pressure where your body bears the most weight, while the PostureTech CS springs respond to shifts in position, which means support stays localised rather than the whole surface sinking. EdgeGuard foam strips around the inside of the spring unit firm up the perimeter, useful if you sleep near the edge or sit on the bed to get dressed. Yes, the five-year guarantee is shorter than some brands offer, but the price reflects that, and the fire safety certification to BS7177: 2008 is reassuring.
Key features & layer details
MemorySense Foam PowerPack
A comfort layer that adapts to the shape of your body, cocooning you in soft foam. It relieves pressure on the parts of your body that bear the majority of your weight, typically hips and shoulders.
PostureTech CS Spring System with EdgeGuard
Sealy's adaptive spring system responds to subtle shifts in body weight and pressure, giving localised support rather than a uniform push-back. High-density EdgeGuard foam strips wrapped around the inside of the springs firm up the edges of the bed.
Layer details from mattressnextday.co.uk product page, September 2026.
Best suited for?
Back sleepers
The Medium Firm feel and the PostureTech CS springs give localised support, which means your hips stay held up while the foam cushions your back.
Combination sleepers
Medium Firm suits most people who change position, and the springs respond to shifts in body weight, so support follows you as you turn.
Budget buyers
It sits at the affordable end for a sprung memory foam mattress from an established name, with a five-year manufacturer guarantee included.
Couples
The EdgeGuard foam strips firm up the perimeter, so there is more usable space near the edge and sitting on the bed feels steadier.
If you sleep hot, be cautious: memory foam holds warmth more than some materials. Lightweight side sleepers may find Medium Firm slightly too firm for full pressure relief at the shoulder. And because it arrives flat rather than boxed, it's a tricky choice for homes with narrow staircases or tight turns.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Sealy Ortho Plus Silver Memory Mattress
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FAQ's
Is the Sealy Ortho Plus Silver Memory Mattress firm?
It's described as Medium Firm. That means a supportive feel with some surface softness from the memory foam layer, which suits most back sleepers and heavier side sleepers, although very light sleepers may find it a little firm.
How much does the Sealy Ortho Plus Silver cost?
It depends on the size you choose, and the price table on this page shows the current price for each size. It's available in UK Single, Small Double, Double, King and Super King.
Does the Sealy Ortho Plus Silver come with a guarantee?
Yes, it carries a five-year Sealy manufacturer guarantee, as stated on the mattressnextday.co.uk listing. That's shorter than some brands offer, but it comes at a lower price point.
Is the Sealy Ortho Plus Silver delivered rolled in a box?
No. It's delivered flat, not rolled and boxed, so check access through doorways and stairwells before ordering. Mattressnextday.co.uk offers free next day delivery on this listing; delivery terms may differ elsewhere.
How deep is the Sealy Ortho Plus Silver mattress?
It's 25cm deep, which fits standard fitted sheets comfortably. The depth comes from the memory foam comfort layer sitting over the PostureTech CS spring unit.
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