Sealy Imperial Contract Memory Mattress
The Sealy Imperial Contract Memory Mattress pairs memory foam with a sprung core, which means you get that slow, cradling surface feel without the sunk-in softness an all-foam bed can have.
- Shallow hug, easy to change position
- Eases pressure at hips & shoulders
- Firmer support where you press hardest
£775
Get the lowest price we've found
The Sealy Imperial Contract Memory Mattress is described by Sealy as medium to firm, so it suits back and stomach sleepers and heavier side sleepers, although lightweight side sleepers may find it a little too firm at the shoulder. At 31cm deep it has a substantial, hotel-style build, and the Damask cover carries an OEKO-TEX certification. It's a serious spend, but the depth and hybrid construction go some way to justifying it.
Mattress specifications
Firmness
Medium Firm
Type
Memory Foam
Depth (cm)
31
Number of Layers
3
Trial Period (nights)
100
Warranty (years)
5
Price Range
£775 to £1,385
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
OEKO-TEX, 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?
Choose this if you like the pressure relief of memory foam but worry about feeling stuck. The MemorySense top layer contours to your shape, while the firm Reflex foam beneath stops you sinking too deeply, so the hug stays shallow rather than swallowing. Underneath, Sealy's PostureTech springs respond to weight by firming up where you press hardest, which means heavier areas like hips get more pushback and your spine stays straighter. It conforms to BS7177 fire safety standards including the stricter Crib 5 rating, and Sealy is a National Bed Federation approved brand. Available in UK Single through to Super King.
Key features & layer details
MemorySense foam
Sealy's MemorySense foam sits on top and contours to your shape, easing weight off pressure points like hips and shoulders. You feel it as a gentle, relieving cradle rather than a firm surface.
Reflex Foam
A firm Reflex foam layer follows, contouring to your body while stopping you sinking too deeply. In practice this keeps the memory foam feel shallow and supportive, which makes changing position easier.
PostureTech Core Support Springs
Sealy's PostureTech springs form the core and become firmer when met with pressure, so support increases exactly where your body pushes hardest. The tops of the springs are made to a softer tension, which means they follow your shape rather than feeling rigid.
Layer details from mattressonline.co.uk product page, September 2026.
Best suited for?
Back sleepers
The medium firm feel and PostureTech springs, which firm up where you press hardest, keep the hips supported so the spine stays straighter.
Front sleepers
A firm Reflex foam layer stops you sinking too deeply, so the middle of your body stays lifted rather than dipping into the mattress.
Heavier sleepers
Springs that become firmer under pressure give heavier areas like hips more pushback, while the 31cm depth adds a substantial, hotel-style build.
Combination sleepers
The memory foam hug stays shallow because of the Reflex foam beneath, which makes changing position easier during the night.
Allergy sufferers
The Damask cover carries an OEKO-TEX certification, which is a reassuring detail if you are choosing a mattress with sensitivity to materials in mind.
Lightweight side sleepers may find the medium to firm feel a little unforgiving at the shoulder. If you dislike the slow, moulding sensation of memory foam altogether, a traditional sprung mattress will suit you better. And given the starting price, budget shoppers will find gentler options on the wallet.
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 Imperial Contract Memory Mattress
Select a comparison article below or choose to compare this mattress side by side with up to 2 other mattresses.
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
How firm is the Sealy Imperial Contract Memory Mattress?
Sealy describes it as medium to firm. That places it towards the supportive end of the scale, well suited to back and stomach sleepers and heavier bodies, though lighter side sleepers may want something softer.
Does the Sealy Imperial Contract come with a trial period?
MattressOnline lists a 100-night trial on this mattress, but it is the retailer's own offer rather than a Sealy policy, and it requires buying a mattress protector from MattressOnline. If you purchase elsewhere, check that retailer's returns terms before ordering.
How long is the guarantee on the Sealy Imperial Contract Memory Mattress?
The retailer listing states a 5 year guarantee. As with the trial, confirm the guarantee terms with whichever retailer you buy from.
How deep is the Sealy Imperial Contract Memory Mattress?
It measures 31cm deep, which is a generously deep build. Standard fitted sheets may feel tight, so deep-fitted sheets are a safer bet.
What sizes does the Sealy Imperial Contract come in?
It's available in UK Single, Double, King and Super King.
Couldn't find an answer to your question? Send us a message