Sealy Alston Gel Advantage Pillow Top Mattress
The Sealy Alston Gel Advantage Pillow Top Mattress combines a Geltex breathable comfort layer with a pillow top, which means extra surface cushioning on a medium-rated mattress, with less trapped heat.
- Cushioned pillow top surface
- Breathable gel comfort layer
- Reinforced edges for steadier sides
£499
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The Sealy Alston Gel Advantage Pillow Top is a 29cm deep, medium-rated mattress with PostureTech Core Support springs, a Geltex comfort layer and a pillow top for extra cushioning. It suits sleepers who want a medium feel with a little more give on the surface. It comes in a UK single, UK small double, UK double, UK king and UK super king. Mattress Online offers a 100-night comfort trial, and Sealy gives a 5-year guarantee.
Mattress specifications
Firmness
Medium
Type
Pillow Top
Depth (cm)
29
Number of Layers
Trial Period (nights)
Warranty (years)
Price Range
£499 to £875
Best Sleeping Position(s)
Back Sleeping
Combination Sleeping
Side Sleeping
Certifications
BS 7177
Assessed from the specification published by mattressonline.co.uk, captured October 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
Sealy rates this mattress medium, which suits a wide range of sleepers, and the pillow top adds a cushioned surface on top of that. The Geltex layer is an open-cell gel and foam blend, which means it should breathe better and trap less heat. The reinforced Edge Guard border is high-density foam, so the sides should feel steadier when you sit or sleep near the edge. It is handcrafted in the UK, and the turning handles make it easier to rotate when you want to even out wear.
Key features & layer details
We’re still collecting information on this mattress. Unfortunately, we don’t have its key features yet.
Best suited for?
Side sleepers
The pillow top adds a cushioned surface over the medium feel, which means a little extra give where shoulders and hips press into the mattress.
Warm sleepers
The Geltex layer is an open-cell gel and foam blend, which means it should breathe better and trap less heat through the night.
Couples
The reinforced Edge Guard border is high-density foam, so the sides should feel steadier when either of you sits or sleeps near the edge.
Combination sleepers
A medium rating suits a wide range of sleepers, and the pillow top keeps the surface soft enough to feel comfortable as you change position.
If you prefer sleeping on a firm mattress, this might not be the best choice. It's rated medium, and the pillow top adds cushioning on the surface, so it won't give the flat, unyielding feel some people want. It is also single-sided, so you can rotate it using the turning handles but not flip it.
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 Alston Gel Advantage Pillow Top Mattress
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FAQ's
How firm is the Sealy Alston Gel Advantage Pillow Top?
Sealy rates it medium. The pillow top adds cushioning on the surface, so it suits sleepers who want a medium feel with a little extra give, but not anyone who is after a firm mattress.
What sizes does the Sealy Alston Gel Advantage Pillow Top come in?
It comes in a UK single, UK small double, UK double, UK king and UK super king. The UK super king measures 180 x 200cm and the UK king 150 x 200cm.
How deep is the Sealy Alston Gel Advantage Pillow Top?
It is 29cm deep. That is a fairly substantial mattress, so check your bed frame and any fitted sheets you plan to reuse before ordering.
Can you flip the Sealy Alston Gel Advantage Pillow Top?
No, it is single-sided and can't be flipped. It does have turning handles, so you can rotate it to help wear spread more evenly.
Does the Sealy Alston Gel Advantage Pillow Top come with a trial or guarantee?
Mattress Online offers a 100-night comfort trial, which is the retailer's own offer. Sealy gives a 5-year guarantee on the mattress.
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