Firmness
Type
Memory Foam
Depth (cm)
25
Number of Layers
2
Trial Period (nights)
100
Warranty (years)
5
Price Range
£328 to £584
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
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 & what's inside
- 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.
Who's it NOT for?
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.
Sealy Eaglesfield Memory Ortho Plus Mattress
Across 238 reviews on the mattressonline.co.uk product page it holds a 4.5 rating, with owners praising the comfortable, supportive feel and relief from back pain, though a few found it softer than expected for a firm mattress.
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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, with prices ranging from £328 to £584 depending on the size you choose.
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