Sealy Eaglesfield Memory Ortho Plus Mattress
The Sealy Eaglesfield Memory Ortho Plus is a firm memory foam and spring mattress, 25cm deep.
- Memory foam eases hips & shoulders
- Springs tune support to your weight
- Firm overall feel
£338
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The Sealy Eaglesfield Memory Ortho Plus has a layer of MemorySense foam over Sealy's PostureTech Core Support Springs, which means you get the moulding, pressure-relieving feel of memory foam with proper spring support underneath rather than foam alone. It's handcrafted in the UK by a National Bed Federation approved brand, and comes in five sizes from UK Single up to UK Super King. If you want a firm feel without giving up that slow, cradling foam comfort on top, it's a sensible shortlist candidate at a mid-range starting price.
Mattress specifications
Firmness
Firm
Type
Memory Foam
Depth (cm)
25
Number of Layers
2
Trial Period (nights)
100
Warranty (years)
5
Price Range
£338 to £594
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Certifications
BS 7177
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
The main appeal is the combination of firm support and pressure relief. The PostureTech springs use varied tensions and shapes, which means different parts of your body get support suited to their weight, helpful if you wake with an aching back. The MemorySense foam layer softens the surface just enough to ease pressure points at your hips and shoulders. Buying through Mattress Online adds a 100-night trial and a 5 year guarantee, plus free delivery to most locations with a two-hour time slot. Do note those terms are the retailer's own, so check whichever shop you buy from. Across owner reviews, some found it slightly softer than the firm label suggests, which many buyers actually welcome.
Key features & layer details
MemorySense Memory Foam
A memory foam comfort layer that moulds to your body, which means pressure builds more slowly at your hips and shoulders as you settle. It's designed to soothe pressure points and ease aches and pains.
PostureTech Core Support Springs
A spring system using unique shapes and varied tensions, which means firmer support where your body is heavier and gentler give elsewhere. The result is full-body support with pressure relief rather than a uniformly hard base.
Layer details from mattressonline.co.uk product page, September 2026.
Best suited for?
Side sleepers
The MemorySense foam layer moulds to your body, which means pressure builds more slowly at the hips and shoulders when you lie on your side.
Back sleepers
PostureTech springs use varied tensions and shapes, which means heavier areas get firmer support and your back stays well supported across the whole body.
Combination sleepers
A memory foam top over a spring core gives pressure relief and proper support together, which suits moving between positions through the night.
Couples
Spring support underneath the foam layer gives a stable base for two, and the range runs from UK Single up to UK Super King.
Heavier sleepers
Varied spring tensions give firmer support where your body is heavier, so you get a supportive base rather than foam alone.
If you dislike the slow, hugging feel of memory foam, this isn't the mattress for you. Genuinely firm-feel seekers should also pause: some owners found it softer than the firm rating implies. It's single-sided, so if you prefer a mattress you can flip to extend its life, look elsewhere.
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 Eaglesfield Memory Ortho Plus Mattress
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FAQ's
How firm is the Sealy Eaglesfield Memory Ortho Plus mattress?
It's rated firm, so it suits people who like a supportive, no-sink sleeping surface. That said, some owners across verified reviews found it a little softer than expected for a firm rating, which lightweight sleepers may actually prefer.
Does the Sealy Eaglesfield mattress come with a trial period?
Mattress Online lists a 100-night trial with this mattress. That trial is the retailer's own offer rather than a Sealy guarantee, so if you buy elsewhere, check that retailer's returns policy before ordering.
How long is the guarantee on the Sealy Eaglesfield mattress?
The mattressonline.co.uk listing includes a 5 year guarantee. As this appears on a retailer listing, confirm the guarantee terms with whichever shop you buy from, since cover can differ between sellers.
Do you need to turn the Sealy Eaglesfield mattress?
It's single-sided, so it shouldn't be flipped. The listing states turning handles are included, though at least one owner review mentions a lack of handles, so it may be sensible to check with the retailer if rotating easily matters to you.
What sizes does the Sealy Eaglesfield mattress come in?
Five UK sizes: Single, Small Double, Double, King and Super King.
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