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Sealy Alston Advantage Mattress - image 1 Sealy Alston Advantage Mattress - image 2 Sealy Alston Advantage Mattress - image 3 Sealy Alston Advantage Mattress - image 4 Sealy Alston Advantage Mattress - image 5 Sealy Alston Advantage Mattress - image 6

Sealy Alston Advantage Mattress

4.7/5
Cooling gel foam rests on a PostureTech spring core for a medium feel that stays temperate through the night.
iconMedium
iconGel Foam
iconPostureTech
icon28cm depth
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The Verdict

What 196 sleepers really think

Rated 4.7/5 from 196 verified reviews
The Sealy Alston Advantage mattress received praise for its comfort and supportive nature, often described as luxurious and thick. Users highlighted its excellent value for money and the high-quality construction. While many found it provides a good balance of softness and firmness, allowing for a comfortable sleep, some noted it feels warmer due to the memory foam. A few buyers mentioned the need for deeper sheets due to its thickness. Overall, customers expressed satisfaction with their improved sleep quality.

AI-generated from the text of customer reviews

Why This Mattress

Why buy the Sealy Alston Advantage Mattress?

Every mattress is different. Scan for the ones that sound like you — if two or more fit, this is your mattress.

Best For
Side Sleepers
Curl up on your side?
Enough give at the shoulders and hips to keep side sleepers comfortable and aligned.
Helps with
Allergies
Wake up itchy or sneezy?
Hypoallergenic fillings and covers help keep dust mites and allergens at bay - ideal for allergy-prone sleepers.
Helps with
Pressure Relief
Achy hips or shoulders?
Cushioning comfort layers spread your weight evenly, easing pressure around hips and shoulders.
Thermal Control
Cooling
Sleep hot?
Breathable layers draw heat away from you overnight, for a cooler sleep if you tend to run warm.
Suitability
Adults
Buying for a grown-up bed?
Built for full-grown sleepers, with the depth and support to take adult weight night after night.
How It Feels

How firm is it?

Medium

Medium is the level of support to the body, suitable for all average weighted people. This is not a comfort rating.

About the Brand
★ 4.69 brand rating

Sealy is famous for its award-winning mattresses, crafted through 20 years of collaboration with the International Orthopaedic Advisory Board. Featuring innovative technologies like the AlignSupport® Coil System and memory foam, Sealy ensures targeted support and comfort for a restful night’s sleep for every type of sleeper.

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Real Sleepers

What our customers say

4.7
Product Rated 4.7 Stars
196 reviews
Average Customer Ratings
Comfort4.3
Durability4.3
Quality4.8
Value for money4.4
Rating Snapshot
5 stars
151
4 stars
35
3 stars
3
2 stars
4
1 stars
3
Excellent151
Great35
Average3
Poor4
Bad3
Robert Brookes
Customer Rated This 5 Stars 5/5
14 Oct 2022
We had Sealy Millionaire mattresses years ago (pre-memory foam) and they were the best mattresses we had. Finally, after trying countless others, we found the new no-turn version with memory foam tops. Sid-sleepers need soft mattresses which are almost impossible to find but these do the job. Hope they last as long as they manufacturers say.
Comfort5
Quality5
Durability5
Value5
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L a Cross
Customer Rated This 5 Stars 5/5
17 Jan 2026
Well it has taken a couple of weeks to get used to......but actually is very comfy. Our previous mattress was a Sealy posturpedic with mattress topper which was delightful but way past its sell by date, hence the change! I would recommend this as very good price for a good quality mattress.
Quality5
Comfort5
Value5
Verified By trustpilot verification
Valerie Dickason
Customer Rated This 5 Stars 5/5
13 Aug 2025
Excellent mattress, I already have one on another bed so knew it would be comfortable. Had to wait a month for it but was happy to do so. Competitive price. Only negative was the delivery drivers who were not particularly helpful, didn’t even take the plastic off the mattress for me.
Quality5
Durability5
Value5
Comfort5
Verified By trustpilot verification
Mark Smith
Customer Rated This 5 Stars 5/5
12 Jun 2024
I bought this mattress as my partner was starting to suffer with an aching back in the mornings and not sleeping well. Since she has had this mattress, all her issues have gone away. Great support plus lovely comfortable feel toit.
Comfort5
Durability5
Quality5
Value5
Verified By trustpilot verification
Senga Sneddon
Customer Rated This 5 Stars 5/5
02 Feb 2024
My husband has had a much better sleep since buying this mattress. He was in pain before buying this as the previous mattress was so uncomfortable. I would recommend
Comfort5
Durability5
Quality5
Value5
Verified By trustpilot verification
Geoff Holroyd
Customer Rated This 5 Stars 5/5
23 Jul 2025
Mattressman service excellent and the mattress is comfortable good price too.
Quality5
Comfort5
Value5
Verified By trustpilot verification
Viewing 1 to 6 of 196
Our Promise

The Alston Advantage Mattress has

A 60-night sleep trial Sleep on it at home — love it, or exchange it between nights 30 and 60.
A 5 year guarantee See exactly what's covered, and for how long.
Price Match Promise Seen it cheaper somewhere else? We'll match it.
Good To Know

Frequently asked questions

Is the Alston Advantage mattress suitable for allergy sufferers?
Yes, the Alston Advantage mattress is recommended for allergy sufferers due to its hypoallergenic polyester fibre fillings and fabric, which help reduce allergens.
What kind of fillings are used in the Alston Advantage mattress?
The mattress features white fibre fillings made from 100% hypoallergenic polyester, providing durability and comfort.
Does the Alston Advantage mattress need to be turned regularly?
This mattress is designed to be one sided, so there is no need to turn it; however, regular rotation is recommended to maintain its shape and comfort.
What type of spring unit does the Alston Advantage mattress use?
The mattress uses an open coil spring unit, which is constructed from a continuous length of wire, making it a great option for those seeking a firmer and budget-friendly mattress.
How does the pillow top effect work on the Alston Advantage mattress?
The pillow top effect on the Alston Advantage looks separate from the mattress but is actually attached with a hidden return, providing soft comfort without compromising support.
Are there handles on the Alston Advantage mattress for easy movement?
Yes, the Alston Advantage mattress has handles attached to the border, which aid in the rotation and turning of the mattress.
What is the fire safety rating of the Alston Advantage mattress?
The Alston Advantage mattress has a Domestic Flammability Rated Source 2 for Low Hazard, making it suitable for general domestic use.
What makes the Geltex layer in the Alston Advantage mattress effective at regulating temperature?
The Geltex layer in the Alston Advantage mattress combines elastic gel with air-permeable foam, creating a highly breathable structure. This open-cell design allows the material to wick away excess heat and moisture, helping to maintain a cool sleeping environment throughout the night. As a result, it can effectively address issues of overheating during sleep, providing comfort and temperature regulation.
How firm is the Alston Advantage mattress?
The open coil spring unit provides a firmer feel, making the Alston Advantage a suitable choice for those who prefer a more supportive sleeping surface.
Can the Alston Advantage mattress be used with any bed base?
While the Alston Advantage mattress can be used with most bed bases, it's best to use it on a firm and supportive base to ensure optimal performance and comfort.
Better Together

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Where to next?

Sealy Mattresses
Sealy Medium Mattresses
Sealy Open Coil Mattresses
Sealy Sealy Advantage Range

60-night sleep trial: exchanges only, not refunds. Activated by purchasing a mattress protector at the point of order. Request your exchange between nights 30 and 60 of the trial; a £50 exchange fee applies. Full terms.

Recommendation rate: the percentage of verified Trustpilot reviews for this product with a rating of 4 stars or more, rounded down.

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