Sealy PostureTech Alderney Mattress

Sealy PostureTech Alderney Mattress

sleeping cat
24p per sleep based on average mattress lifespan
Small Double
King Size
Super King
With Divan Bed Set
With Ottoman Bed Set
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Tests & Verdict

Here we collect tests, guides and product reviews so that you can create a picture of what others think about the product. This analysis and review is based on my experience and 12+ years of industry insight.

  • With its stellar comfort levels, the Sealy PostureTech Alderney Mattress offers an optimal indulgent sleep experience that reviewers adore.
  • The mattress's memory foam is touted as providing a cocoon-like sensation, significantly enhancing the sleep quality each night.
  • Quality shines through in every aspect of this mattress, as verified by numerous thrilled customers.
  • Value for money isn't to be overlooked – the Sealy PostureTech Alderney Mattress receives high praise for its competitive price point corresponding to its quality.
  • Its sturdy packaging and reliable delivery process is another attribute users have appreciated, ensuring the product arrives in perfect condition.
  • Reviewers strongly recommend this bed on its ability to successfully meet a wide range of sleep needs, making it a standout choice amongst competitors.
  • While the mattress is noted for its high-quality construction and comfort, some customers may find the firmness level not to their preference.
  • The Sealy Alderney mattress, being single-sided, requires regular rotation which might not cater to everyone's convenience.
  • Although it is an online exclusive product, some customers prefer the traditional way of testing the mattress in the store before purchasing.

Read why our sleep experts loved it ›

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
Acid reflux icon
Helps with acid reflux
When paired with a compatible adjustable bed.
Toss and turn icon
Good for those who toss and turn
Materials like memory foam can restrict movement.

Still not sure if the Sealy PostureTech Alderney Mattress is suitable for you? Answer 4 simple questions with our quiz.

Take Suitability Quiz

Why our sleep experts loved it

They say your bed is not merely a piece of furniture but indeed an investment, an investment in your comfort, health, and well-being. The correct mattress plays a vital role in ensuring a refreshing sleep and ultimately a rejuvenated you. Hence it's crucial to choose a mattress consciously. Today, let's delve into the world of one such mattress - the Sealy PostureTech Alderney Mattress. As a writer with a decade-long experience in the mattress industry, let's uncover if this mattress is worth your investment or not.

How we tested

In this review, I've tried to provide an honest, unbiased, and detailed assessment of the Sealy PostureTech Alderney Mattress. The mattress was tested for around a fortnight, ensuring a comprehensive experience. It was tested through warm and cooler nights, investigating various aspects such as its adaptability to different body contours, warmth absorptions, effect on pressure points, etc. The mattress was permitted ample time to decompress before the assessment commenced.

Design and features

The Sealy PostureTech Alderney mattress is bedecked with manifold unique and user-friendly features. The firm comfort grade, twice-tempered PostureTech springs, the quilted soft-touch knitted cover, responsive foam layers are some of the standout features. This mattress uses the unique Sealy spring technology, which transitions from soft to like a guardian angel when your body needs it. The EdgeGuard enforces the mattress's border, allowing you a larger sleeping area and additional durability. All of these said features accompany the commitment of raw materials being sourced ethically and sustainability in the process of manufacturing, making this mattress a prospective choice for the environmentally conscious consumers.

Mattress comfort

The comfort is one aspect where the Sealy PostureTech Alderney mattress does not disappoint. The mattress offered a comforting and inviting feeling right from the start. It has a firm disposition but feels soft to touch. With a MemorySense® layer, the mattress offers a sense of being cocooned, adding more to the comfort factor. This mattress has managed to strike a perfect balance between firmness and softness, offering a snuggly and embracing feeling while maintaining upright support to your back and hips.


This mattress would be perfectly suited for people with orthopaedic issues, essentially those seeking a firm and supporting mattress. However, it's worth mentioning that this mattress would not entirely accommodate the needs of side sleepers and might feel uncomfortable over time. Hence, if you are a side sleeper, I suggest you look for other options.

What customers thought

Customer reviews echo a similar sentiment where this mattress's comforting and supportive features were greatly appreciated. One of the customers commended this mattress highly for its cocooning comfort and excellent value. The mattress's quality and value were a universal theme prevalent in most of the customer reviews, testifying to the satisfaction enjoyed by the users.

The verdict

In conclusion, the Sealy PostureTech Alderney Mattress boasts a sturdy construction, quality materials, and most importantly, attention to detail in comfort. The mattress offers excellent value for the price and a good night's sleep. The manufacturer's confidence in the product is evident from the robust 5-year guarantee which offers peace of mind. However, the lead times may feel longer, and it might not accommodate the requirements of side sleepers. Notwithstanding that, the Sealy PostureTech Alderney Mattress is worth considering for anyone seeking both comfort and support from their mattress.

Why you can trust WantMattress We spend hours testing (and/or researching) every product or service we review, so you can be sure you’re buying the best. Find out more about how we test.

How does it feel?

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

weight description image


The price graph displays the lowest price over time excluding shipping.

Alternative products with similar specifications

We have handpicked some alternate options that should perform equally well that are worthy of consideration if you are interested in the Sealy PostureTech Alderney Mattress.

Quantitative Measurements KPI question mark
Of The Sealy PostureTech Alderney Mattress
Here's how the product performs based on the materials and composition when compared to other products of similar price point. These measurements are produced using a combination of specification-heavy algorithmic data points and our own hands on experience.

Quantitative Measurements KPI question mark

Here's how the product performs based on the materials and composition when compared to other products of similar price point. These measurements are produced using a combination of specification-heavy algorithmic data points and our own hands on experience.


*Assuming average weight, suitability will vary dependant on body type, use the quiz above for a more tailored guide.
  • Back Sleepers
  • 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
  • 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
  • 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.


  • Initial Odour
  • 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
  • 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
  • This is based on community driven customer reviews tied to product reviews and grouped together at a brand level to produce a score.
Of The Sealy PostureTech Alderney Mattress
Brand: Sealy
Retailer: Dreams
Delivery Time: Average
Delivery Charge: Excellent
Guarantee: Good

Calendar Icon Radar Analysis Radar Analysis Question Mark

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.

Product Relevant Videos

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

Firm vs Soft Mattress
Firm vs Soft Mattress
By BedStar
Waking Up On A Sealy Posturepedic
Waking Up On A Sealy Posturepedic
By Sealy SA

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How we reviewed this product

At WantMattress, we adhere to stringent sourcing standards, drawing from peer-reviewed research, scholarly institutions, medical associations, and firsthand accounts and experience. We refrain from using tertiary sources. To understand how we maintain the accuracy and up-to-date nature of our content, please read further about how we test.

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