Sealy Alston Gel Advantage Pillow Top Mattress Rated 5/5 based on 18 customer reviews
Sealy Alston Gel Advantage Pillow Top Mattress helps with

Sealy Alston Gel Advantage Pillow Top Mattress

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5.0/5 - Read 18 Reviews
sleeping cat
15p per sleep based on average mattress lifespan
Single3' x 6'3
Small Double4' x 6'3
Double4'3 x 6'3
King Size5'0 x 6'6
Super King6'0 x 6'6
With Divan Bed Set
With Ottoman Bed Set
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Why Our Sleep Experts Loved It

becky says

Welcome to the world of comfort and support with the Sealy Alston Gel Advantage Pillow Top Mattress. This product claims to allow you to experience a level of comfort that you never thought possible. This innovative mattress is designed to provide the perfect balance between comfort and support. It features a combination of PostureTech Core Support Springs and Geltex foam that provides the ideal level of support for all body types and sleeping positions. But does it live up to the hype? Let’s find out below.

The Sealy Alston Gel Advantage Pillow Top Mattress is an all-around high-performance mattress that is designed to offer a perfect balance of comfort and support, offering better breathability than the competition at a price point which sits fairly well in the middle-ground. It is designed with a combination of PostureTech Core Support Springs and Geltex foam that work together to provide excellent comfort and support. The Core Support Springs are uniquely designed and unique to Sealy and move somewhat independently of each other, resulting in better motion isolation and pressure relief than some of the competitors in this space. The Geltex foam is designed to provide a plush and luxurious sleeping surface that contours to your body for good comfort and support, rivalling memory foam for comfort but with better breathability and cooling properties.

Benefits of PostureTech Core Support Spring

PostureTech Core Support Spring mattresses are one of the most popular mattress types on the market today despite being limited to Sealy products only. This is due to the fact that they are surprisingly durable, long-lasting, and tend to provide a good level of support for a reasonable price point. This means that you won't be disturbed if your partner moves around in the night.

The Core Support also provides superior edge support, which helps to reduce sagging and provides a more consistent sleeping surface. Finally, the PostureTech Core Support Springs are also designed to provide better ventilation and temperature regulation, which helps to keep you cool and comfortable throughout the night.

Benefits of Geltex Foam

Geltex foam mattresses are one of the most popular mattress types on the market today. This is due to the fact that they are incredibly comfortable and provide superior support. The Geltex foam is designed to contour to your body for superior comfort and support. It also provides better breathability and cooling technology which prevents you from getting too warm while you sleep, performing better than memory foam in this regard. Ultimately, Geltex foam provides superior ventilation and temperature regulation, which helps to keep you cool and comfortable throughout the night.

Customer Reviews

The Sealy Alston Gel Advantage Pillow Top Mattress has received overwhelmingly positive reviews from customers with many customers have commented on the great balance of the medium tension, proving to be suitable for both side and back sleepers. Others commented on the superior comfort and support that the mattress provides over their previous product. Negative reviews are a bit harder to come across with the only real complaints being around the delivery process and the lack of turning handles. The lack of handles is a bit of a pain and a bit of miss-step from Sealy although it might not affect everyone equally.

How does it feel?

Firmness of The Sealy Alston Gel Advantage Pillow Top Mattress depends on bodyweight. Adjust your weight below to get an indication of how it may feel. Remember though that firmness is entirely subjective.
weight description image

Reasons to Buy

Geltex is a great comfort layer that works really well, unique to Sealy and Silentnight, this breathable layer is preferable over memory foam for us.

Reasonable price point, although Sealy are trying to break back into the mid-high end, removing their budget line-up.

Strong customer reviews show the mattress performs well.

Reasons to Avoid

Pillow tops are contentious, I don't personally have a problem with them however some find them extra layer a hinderance rather than a help.

Price points are going up from Sealy making it harder to access that unique Geltex layer than. in previous years.

Key Performance Indicators KPI question mark
Of The Sealy Alston Gel Advantage Pillow Top Mattress
Our Key Performance Indicators are produced using a combination of specification-heavy algoritmic data points and user reviews.

Key Performance Indicators KPI question mark

Our Key Performance Indicators are produced using a combination of specification-heavy algoritmic data points and user reviews. For example, a firm pocket spring support layer is more breathable and offers better back support but may prove unsuitable for side sleepers, the reverse is true for a soft-medium tension reflex foam support layer. This is one of 100+ datapoints considered when generating the below ratings.


*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.


  • Breathability
  • Mattresses that feature breathable materials help promote airflow and keep you cool making for a more hygienic night's sleep.
  • Turning on mattress
  • Certain materials like memory foam can make it difficult to move about on the mattress while you toss and turn. Same too for pillow tops which can create a cloud like sensation which can make manoeuvrability challenging.
  • Stability
  • 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.


  • 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 Alston Gel Advantage Pillow Top Mattress
Brand: Sealy
Retailer: Mattress Online
Delivery Time: Excellent
Delivery Charge: Excellent
Customer Sentiment: 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.

What Makes The Sealy Alston Gel Advantage Pillow Top Mattress Great?

A supportive memory foam mattress - part of the Simply Sealy range

Memory foam has properties that adapt shape of your body, immediately recovering its original shape once pressure is no longer applied. It adapts to your movements without sinking, ensuring that pressure is not produced, but without the wrapping feeling which would otherwise cause unnatural posture.

Featuring 2cm of plush memory foam comfort

Memory foam offers body hugging comfort which us largely suitable for all sleeping positions and with superior motion absorption you'll find it easier than ever to get to sleep with a partner that tosses and turns during the night. Further benefits come in the form of good pressure relief with hypo allergenic properties that helps to repel mold and mildew while being resistant to dust mites.

Memory foam helps soothe aches and pains and relieves pressure point build-up

Memory foam has properties that adapt shape of your body, immediately recovering its original shape once pressure is no longer applied. It adapts to your movements without sinking, ensuring that pressure is not produced, but without the wrapping feeling which would otherwise cause unnatural posture.

1000 pocket springs provide plenty of support, where you need it most

Pocket springs are a great support layer. Available in a variety of firmness's, the quality of a spring system is generally determined by the spring count. With 1000 springs this mattress represents a good quality to cost ratio, providing enough springs to successfully contour to your body and provide you with a great nights sleep.

Pocket springs react to your individual shape and movement, for tailored support

Pocket springs are of considerable better quality than their poorer traditional open coil counterparts. Put simply, pocket spring contours better and supports better than other base layers. When it comes to pocket spring mattresses, the general rule of thumb is that the more springs the better. There are exceptions, of course, but for the best part this is likely to be a good quality mattress based on it's base layer.

There's no transfer of movement, for a more peaceful night's sleep

The knitted cover is beautifully smooth and soft to the touch

Knitted covers offer a good degree of breathability that helps keep you cool while you sleep which is also particularly important for hygiene. Knitted covers are also incredibly soft making the fabric an ideal outer layer.

The cover is micro-quilted to help lock in the fillings for long-lasting comfort

This mattress comes with a quilted cover. Many people overlook the cover as a need for consideration however, the right cover can add additional comfort and in the case of this one here, adds quilted comfort that offers a soft but hard-wearing cover that is both breathable and stylish.

A perfectly-balanced medium-firm rating

A medium firm tension mattress is slightly firmer than your average medium mattress. This is ideal for those who either prefer a little bit more support, or, those that have a slightly higher BMI than average. You may also benefit from a medium firmness mattress where you are suffering from neck/back pain as the additional support can help prevent and alleviate these symptoms.

Single-sided - no need to turn your mattress over

A single sided mattress is typical for the industry and relates to how  a mattress has the comfort layer on one side of the mattress. only This means that the mattress only needs to be rotated rather than flipped. The benefit of single sided mattresses is that they require less upkeep in that there's no flipping, but also, there's less components involved in the creation which saves costs.

Depth: 22cm

22cm of mattress depth is enough to house a typical good quality spring system with decent support and comfort layers while also being thin enough to accessorise with standard mattress sheets. No need for deeper sheets and further purchases as a result.

5 year guarantee

A 5 year guarantee is quite rare in the industry and is a great indicator of the retailer beleiving in their product. Anything go wrong in the next 5 years, no drama, get it replaced.

Made in the UK

These are made and manufactured in the UK, meaning that they all meet the same exceptional quality and durability that we expect from genuine UK manufacturing.

Pocket springs

Pocket springs are like natures own springy piece of comfort, except they are not from nature. Alas, pocket springs are a very good part of a mattress and often found in the more premium models. Lower quality products will frequently use open coil spring setups, where pocket springs house each spring in a tiny pocket for additional stability and continued support. Pocket spring typically lasts longer than open coil due to this.

Memory Foam

memory foam is one of the most well known materials used in the upper layer of mattresses. Memory foam basically contours to your entire body with moulding properties. Designed by NASA, this material rebounds to your touch and feels like you are floating on a cloud. Memory foam does not necesserily mean soft either, you can still have firm mattresses for those that want them with a bit of memory foam.

Knitted Cover

It is common in the industry to have a knitted cover, these covers can come in a variety of patterns but are typically hard wearing and do not present problems for consumers.

Medium to Firm

Firmer than the average mattress, a medium to firm mattress is ideally suited to those that are looking for extra back support but still require and amount of comfort from their mattress. Ideally suited for a large range of the populus and becoming much more common, deviating away from the previous medium-for-everyone model.

22cm deep

An average mattress depth, enough room tom comfortably house a decent spring system and comfort layer. You won't need bespoke deep sheets or anything for this size of mattress


Single sided means only one side is comfy. Positives are you only need to rotate the mattress occassionaly rather than the more cumbersome rotate and flip. Downside is the lifespan of the product may suffer as a result, only marginal, but worth mentioning.

Handcrafted in the UK

Handcrafted in the UK means that the product is built here, by people being paid a fair and honest wage using certified and safe products of good quality and construction. UK manufacturing is some of th best in the world and all of that is reflected in this product

Fire Resistant

Fire resistant does not mean the product will never catch fire, rather, it will not go up in flames quite so quickly. Resistant to fire in the same way that I am resistant to kisses, sooner or later you end up giving in.

Approved by the National Bed Federation

The NBF is one of the most prestigious awarding federations in the industry, helped slightly by the fact that it is one of the only, however, it is still a great source of comfort knowing that this product holds approval by the team

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Customer Reviews For The Sealy Alston Gel Advantage Pillow Top Mattress

Based on 18 reviews

Took a long time choosing a mattress as i didn't realise there were so many to choose from, went for a Sealy make as they had some good reviews, then decided i would go for memory foam and springs, and then how much to pay for one. Choose this one in the end and so pleased i did it's lovely to sleep on although firm it's not rock hard. Would by again.


So comfortable and supportive, never had a memory foam mattress before and it's a revalation. Feels really luxurious and just the right firmness. Bit like a hotel bed. Struggling to get to work now as I don't want to get out of bed :)


It's on the firmer side and supports the body very comfortably. The material is very soft and the mattress is quite deep so good if you have a bed low to the ground and want a little more height.


Perfect mattress, firm but not like the floor, getting lots of support where I need it, hips, lower back. As a bonus it's lovely and comfortable too.


I ordered my mattress one afternoon and it was delivered the next day. Excellent service and the mattress was excellent quality. Happy


Offers great support but with a nice soft memory foam top - just enough to not get sweaty! British made too


So comfy. I wake every morning having had a full night's sleep thinking how comfortable my new mattress is!


Excellent comfortable memory foam mattress, all for a good price. Would recommend to anyone


Definitely a good mattress. Good value for money.


Sealy is quality mattress and brand of excellence


I have had lots of lovely sleeps


Comfortable, good value for money!


Very good support and comfort.


every thing is first class


Brilliant nights sleep


Great nights sleep


Enjoying my sleep.


Very comfortable

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