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  4. Sealy PostureTech Oxwich Combination Mattress
Sealy PostureTech Oxwich Combination Mattress
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Sealy PostureTech Oxwich Combination Mattress

FirmnessExtra Firm
ConstructionOpen coil

In shortThis traditional sprung Sealy suits you if you like an Extra Firm feel and solid edges. I'd steer side sleepers elsewhere, especially at this price. Read the review


Reveal Offer Price and Go To Site
100-night comfort guarantee at DreamsConditions
Remedy
An exchange, not a refund
When
Between 30 and 100 nights
Condition
Use a mattress protector from day one

Checked on Dreams' site, 10 October 2026. Full terms at Dreams

Who is it best for? powered by SnoozeScore

In our experience, the materials and construction that go into this product can make it suitable for the following people.

Back sleeping and stomach sleeper icon
For back and stomach sleepers
Additional support helps these positions

What our reviewers found

Pros

  • Renowned for its firm feel providing superior back support.
  • Edge-to-edge support reduces roll-off, improving overall comfort.
  • A couple of owners who had pain say it eased. One wrote: "Back and hip pain went away the first night."
  • Owners find it comfortable as well as firm. One called it "firm but not uncomfortable".

Cons

  • Some sleepers who are not preferential to a very firm comfort grade may find this mattress uncomfortable and overly rigid for their liking.
  • The mattress could be unsuitable if you want enhanced flexibility, given its emphasis on edge support designed to prevent rolling off.
  • The firmness of Sealy PostureTech Oxwich Mattress might be inconvenient for side sleepers as it does not cater to the contours of their body optimally.
  • Those who dislike the traditional tufting style on their mattresses might feel dissatisfied with the design of this product.
  • This mattress may not be favoured by those seeking memory foam or latex technologies rather than the twice-tempered PostureTech springs.
  • As the mattress requires regular turning and rotating, individuals looking for a low maintenance product may not be appreciative of this feature.

The well-being of your sleep is fundamentally influenced by the mattress you rest on, coursing routinely through our sleep cycle and ensuring that our body and mind are fully invigorated for the following day's duties. The quality of your sleep can profoundly influence your overall mood, mental acuity, and general health. It's vital to provide the perfect sleeping environment, which includes choosing the right pillows, duvets, mattress toppers, and of course, an ideal mattress. Today, let's turn our eyes on an offering from a renowned brand in the UK - the Sealy PostureTech Oxwich Mattress.

How We Tested

This mattress has been thoroughly stress-tested with a focus on various factors that directly influence your sleep experience. This includes the overall firmness, temperature regulation, and movement absorption. The analysis was done over a period, considering external factors such as room temperature, sleep schedule, and sleeping patterns, to ensure a wholesome review.

Design and Features

The Sealy PostureTech Oxwich Mattress has a distinctive design that is unapologetically firm, catering to those who yearn for robust support from their mattress. It is kitted out with Sealy's signature PostureTech Core Support system, characterised by twice-tempered springs promising responsive support right where your body needs it. These springs lay the foundation for the mattress, delivering a solid core and meeting the needs of those who require strong orthopaedic backing when they sleep.

This mattress leverages EdgeGuard technology, providing edge-to-edge support to prevent sagging and that uncomfortable roll-off feeling. It is encapsulated by a smooth damask cover, and in particular, doused in tufts that hold the internal constituents firmly in place. This detailed tufting, visible on the surface, extends the mattress's lifespan and provides sleepers with consistent comfort.

Mattress Comfort

The Sealy Oxwich, due to its inherent design and construction, swings towards the firm side of comfort. This attribute can seem like a red flag to the large population that prefers a gentle hold during sleep, however, this firmness level may just be a saviour for those who lean towards solid buttressing for support over soft cushioning. What is a drawback for some is a blessing for others, particularly individuals who need a high level of orthopaedic backing.

Suitability

The Sealy PostureTech Oxwich Mattress's high level of firmness makes it suitable for people who prefer a solid sleeping surface, providing exceptional support for your back and joints. This characteristic makes it an excellent choice for individuals who require strong orthopaedic support. However, if you're someone who values a balance between softness and firmness in your mattress, or particularly benefit from a cushiony feel, this mattress may not be the top choice for you.

What Customers Thought

Owners mostly describe a firm, supportive mattress, and several say they bought it because they wanted or needed one. "If you like or need a very firm mattress, it's ideal," one wrote. A couple of owners who had pain say it has gone. Firm doesn't mean harsh for most of them: "Even though it’s a firm mattress it is super comfortable." Opinions split on how firm it stays. One owner found it "less firmer than we expected". Another said it was "super firm for the 1st month or so" but had "relaxed a little more than I expected". It was too hard for one owner with a bad back, who wrote "my hips r hurting" after nine days. One owner liked the "anti roll off" edge. Several also praise the delivery.

The Verdict

This mattress, despite boasting some impressive features, comes with a caveat - the high price. Given the mattress's overall performance, it doesn't quite match up to its contemporaries priced at the same level. The use of coils over pocket springs affects the mattress's performance adversely, considering pocket springs are shown to offer superior comfort and support. The high level of firmness narrows down its applicability to a specific audience. Better-fitting and more affordable alternatives open up when we navigate away from the realm of ultra-firm mattresses. Nevertheless, the Sealy PostureTech Oxwich Mattress should not be dismissed entirely as it has a unique proposition for those who benefit from its ultra-firm support.

References (3)

  1. Yeoh et al. (2025). Spinal Alignment Analysis for Mattress Selection Across Different Age Groups and BMI Categories: A Preliminary Study. IFMBE Proceedings.

    https://link.springer.com/chapter/10.1007/978-3-031-97374-1_23
  2. Hu et al. (2025). The Effect of Mattress Firmness on Sleep Architecture and PSG Characteristics. Nature and Science of Sleep.

    https://pmc.ncbi.nlm.nih.gov/articles/PMC12071755/
  3. Khatir et al. (2025). Impact of mattress foam hyperelasticity on interface pressure and spinal alignment: A finite element analysis study. Mechanics of Advanced Materials and Structures.

    https://www.tandfonline.com/doi/full/10.1080/15376494.2025.2464254

How we reviewed the Sealy PostureTech Oxwich Combination Mattress

21 owner reviews analysed10+ years in the mattress industryBenchmarked against 71 coil-sprung mattresses20-point spec check14 buyer questions read421 price checks since Nov 2023

Drawing on over 10 years in the mattress industry, our team assessed the construction, materials and firmness of the Sealy PostureTech Oxwich Combination Mattress from its 20-point specification in Dreams' listing, and benchmarked it against 71 other coil-sprung mattresses we track. We analysed all 21 owner reviews. We have checked its price 421 times since November 2023. How we review

How does it feel?

Personalised feel depends on bodyweight. Adjust your weight below to get an indication of how the Sealy PostureTech Oxwich Combination Mattress may feel.

Customer photos

Photos of the Sealy PostureTech Oxwich Combination Mattress in buyers’ homes, shared with their reviews on the retailer’s website. We didn’t take them.

  • customer photo
SnoozeScore

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Price history

From £299 (Single) at Dreams

Choose your size
£499High end of our 90-day readings Read 13 Nov 2026 · excludes delivery
Shop King at Dreams

Our latest King reading against the last 90 days

Low £399 (28 Oct)High £499 (27 Oct)

King price, tracked since 27 Oct

In the last 90 days the King at Dreams has read between £399 and £499.

SizeLatest readingReadLowest readingOnTracking since
Single£29913 Nov 2026£23928 Oct 202627 Oct 2026
Double£39913 Nov 2026£31928 Oct 202627 Oct 2026
King£49913 Nov 2026£39928 Oct 202627 Oct 2026
Super King£59913 Nov 2026£47928 Oct 202627 Oct 2026

Prices exclude delivery. How we record prices: our mattress price report.

How it scores
of the Sealy PostureTech Oxwich Combination Mattress
Scored from the build and owner reviews: each measure starts from how this construction usually performs, then moves with what owners of this mattress report against owners of similar mattresses.
Scored from the build and owner reviews: each measure starts from how this construction usually performs, then moves with what owners of this mattress report against owners of similar mattresses.

Suitability

  • Back Sleepers 4.5/5
  • The amount of support offered from a mattress will vary depending on the firmness of the tension and the type of support layer used. Based on a person of average build.
  • Side Sleepers 3/5
  • If you sleep on your side you typically need a supportive tension that is not too firm, nor too soft. This is because your hips and shoulders need adequate sinkage.
  • Stomach Sleepers 4.5/5
  • Stomach sleepers need a reasonable amount of tension in the base support layer to adequately offer body contouring and help prevent aches and pains. Results will vary based on your build.

Performance

  • Stability 4.5/5
  • Depending on the type of support layer in place can have an impact on stability, edge to edge support and roll together prevention. Pocket springs of a firmer tension will have better stability than open coil soft tension, for example.

Odour

  • Initial Odour 4.5/5
  • Materials in mattresses, particularly memory foam and rolled bed-in-a-box mattresses can have an initial odour, this is typically short term and reduces considerably within 24 hours.
  • Long Standing Odour 5/5
  • Certain materials inside different mattresses can produce a small odour. Typically this is short term rather than long standing but there are minor exceptions.

Brand Rating

  • Overall Brand Rating 4.5/5
  • This is based on community driven customer reviews tied to product reviews and grouped together at a brand level to produce a score.
*Assumes average weight. Suitability is dependent on body type, so check your SnoozeScore above for a more tailored guide.
Radar analysis
of the Sealy PostureTech Oxwich Combination Mattress
Brand: Sealy
Retailer: Dreams
Delivery Time: Average
Delivery Charge: Excellent
Customer Sentiment: Good
Guarantee: Good
Radar Analysis looks at the product, brand and retailer against base norms established within the industry and determines where the product sits by way of established performance metrics.

Owners, by the numbers

Counted from 21 owner reviews of this mattress on retailer sites.

81%gave it 5 stars17 of 21 reviews
9.5%gave it 1 or 2 stars2 of 21 reviews
Top third on priceon price, at £399 (Double)57 of 70 other open coil mattresses cost less today

Counted from reviews published on retailer listings. Each review counts once, even where a retailer shows it on several listings, and reviews left on WantMattress are not included. The method is set out in the reliability report.

Reviews

Pick a star rating to see only those reviews.

4.5owner rating out of 521 reviews
Dylan W
Verified by Dreams
5
Sealy mattress, very comfortable. not too firm. Friendly and helpful delivery staff
Lester Li
Verified by Dreams
5
Good price with qualities
Fresh fish
Verified by Dreams
1
I've left the review about a bed I got from ceiling and I am not happy with the service I ran got silly company and decide the only mattress that does not have memory foam or latex it's the Oxford one and they said that this one for me it's a medium firm which I asked for I spent a lot of money on my mattress and he's so uncomfortable and he don't seem to want to elvia have you ever get this email please let me know what am I rights and can I get my money back you've got a different one
F.Bellucci
Verified by Dreams
5
The mattress offers substantial firmness, complementing a robust bed frame effectively. Its dimensions are ample for dual occupancy, and despite its firm core, the surface layer provides a soft touch. This design achieves an optimal balance between the supportive benefits of a firm mattress for enhanced sleep and the comfort of a plush surface for an improved experience.
manda*73
Verified by Dreams
4
Lovely mattress, great value for money, delivery was great on time with very helpful and very pleasant delivery people, mattress was super firm for the 1st month or so which was fantastic, but has relaxed a little more than I expected so not as firm, I hoping it won't go completely soft in the future
Cathy Lisowski
Verified by Dreams
5
I ordered this mattress as i need a firm one due to having a stroke and ms. It's firm but not uncomfortable. Also has anti roll off which os good for me. Wake up with no pains now. If you need a good firm mattress i highly recommend to try this one.
C Young
Verified by Dreams
5
I was having trouble with my hips and ny back. I thought I would try this as I do prefer a firm mattress. Back and hip pain went away the first night. This mattess is excellent and Im so happy I settled on this one.
Verified customer
Verified by Dreams
5
Fantastic bed frame and at last a mattress that is extra firm just like it says on the site. The bed is quite easy to pust together and being an ottoman has plenty of space below
Anne and Sheridan
Verified by Dreams
5
Great mattress very firm just what we wanted and at a great price the guys that delivered it were friendly and explained how to get the best from our new mattress
Leah585
Verified by Dreams
1
It's been 9 days now and I cnt sleep on this my back is bad and thought this would make it better my hips r hurting just can't sleep I need to change it
123James
Verified by Dreams
5
I needed a very firm matress due to a bad back, and this has proven a very good choice. If you like or need a very firm mattress, it's ideal.
Ladysmirnoff1
Verified by Dreams
5
This mattress is perfect for me. Nice & firm . So comfortable i've had an afternoon nap 2 days running when i haven't needed one.
DollyD
Verified by Dreams
5
Delivered on time and with care. Instructions for the bed build were easy to follow and it took under an hour to construct.
DreamingDreamz
Verified by Dreams
4
We bought an extra firm mattress for a double bed. It is less firmer than we expected, but overall quality is very good.
B.S.
Verified by Dreams
5
Service delivery all good /mattress excellent pleased with my dreams purchase
Verified customer
Verified by Dreams
5
This mattress is absolute quality. Firm and provides excellent support
Aled E
Verified by Dreams
5
Excellent firm mattress giving me a great nights sleep everyday.
RobM59
Verified by Dreams
5
Great Bed. 1st class delivery. What's not to like. Brilliant
Sunshine11
Verified by Dreams
5
Even though it's a firm mattress it is super comfortable.
Sky set
Verified by Dreams
5
Love my bed best sleep i had for a long time no regret.
Chris 2002
Verified by Dreams
5
Great service and delivery men were really obliging

Questions and answers about the Sealy PostureTech Oxwich Combination Mattress

Common questions answered by our team first, then questions shoppers asked the retailer, with the retailer’s own answers.

Image of the post author
Common question
Can you discuss the tension of this mattress and which sleep positions it will be most comfortable for?

Answer: This item possesses a firm tension, which will mainly provide comfort for those who sleep on their backs and, to some extent, the stomach sleepers. Side sleepers or individuals with hourglass body shapes may find discomfort due to the need for more sinkage in the support layer to properly accommodate their hip and shoulder. So, sole back sleepers are likely to find a firm option as the most suitable.
Image of the post author
Common question
How is the edging of the mattress designed to provide support?

Answer: A unique feature of this mattress is the EdgeGuard technology, which offers stability and support right up to the very edge of the mattress. This prevents a roll-off feeling and protects the border against sagging, giving you maximum comfort across the entire surface of the mattress.
Image of the post author
Common question
Is the mattress single or double-sided? How does this impact use?

Answer: The mattress has a double-sided design for added durability, and it provides responsive support that cushions your body where most needed. Regularly turning and rotating can optimise the lifespan and comfort of the mattress.
Image of the post author
Common question
Is there any additional support technology built into the mattress?

Answer: Yes, the mattress incorporates Sealy's PostureTech Core Support spring system. This technology is designed to maximise support to crucial pressure points on your body, ensuring a supportive and comfortable sleep.
Image of the post author
Paul6
Will this be suitable for 30 stone man

Answer: The recommend max weight is 18 stone (114kg) per user. Regular rotation/flipping will help distribute any settlement and aid mattress recovery, extending the life of the mattress. Please follow the mattresses care guide.
Image of the post author
Affrael
Can I use an electric blanket on this mattress? Thank you.

Answer: We do not recommend using an electric blanket on combination mattresses.
Image of the post author
brian mc
how heavy is the Sealy posturetech oxwich combination double mattress

Answer: This mattress weighs 26kgs.

Videos about this mattress

Hand picked video that relates to the specifications of The Sealy PostureTech Oxwich Combination Mattress

Firm vs Soft Mattress
Firm vs Soft Mattress
By BedStar
Open Coil Mattress Production
Open Coil Mattress Production
By Dreamers Bed Centre
Waking Up On A Sealy Posturepedic
Waking Up On A Sealy Posturepedic
By Sealy

Sources for this review

  • Our assessmentConstruction, materials and firmness judged by our team, from over 10 years in the mattress industry
  • Specification20 points from Dreams' listing
  • Owner reviews21 analysed
  • Buyer questions14 read
  • Price history421 checks since November 2023
  • BenchmarkCompared with 71 other coil-sprung mattresses we track
  • Site-wideOur price tracker has logged 1,354,251 retailer prices since June 2019

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