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Sealy Alston Gel Advantage Pillow Top Mattress

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From£479.95

up to

35% off

Comfort trial

Comfort fillings

Firmness rating

Support system

Experience cosy comfort like no other with the Alston Gel Pillowtop Advantage Mattress by Sealy! Featuring a breathable, pressure-relieving layer of Geltex and a quilted pillow top.

PostureTech Core Support Springs
PostureTech Core Support Springs

An innovative spring design from the specialists at Sealy that uses unique shapes and varied tension to provide excellent full-body support and pressure relief.

Geltex
Geltex

For a cooler night's sleep, Geltex is the perfect option. Supremely breathable, this foam layer reduces overheating because of its open-cell structure.

Pillow top
Pillow top

An additional layer of comfort for a more luxurious feel

Reinforced mattress edge
Reinforced mattress edge

Durable edge-to-edge support provides a maximised sleeping surface for a more secure sleep. Sit and lay comfortably right to the very edge with zero 'roll-off' sensation.

Pressure relief
Pressure relief

Offering a soothing night's rest by evenly distributing your body weight across the mattress. The pressure point relief provides the ultimate relaxation needed for a deep slumber.

Knitted cover
Knitted cover

A sumptuously soft finish that provides additional cosiness and warmth. Knitted covers enhance airflow and are incredibly breathable. So, you can enjoy a cooler snooze.

Medium
Medium

Not too soft, not too firm - the perfect balance

29cm deep
29cm deep

About 11.4 inches deep. Depth is an important factor when buying a mattress as it can affect the suitability for particular bedding, mattress toppers and bed frames.

Single-sided
Single-sided

With a single-sided mattress, there's no need to flip. Simply rotate every few months to care for your mattress. Fuss free mattress maintenance!

Includes turning handles
Includes turning handles

Stitched into the mattress border, turning handles are there for easier moving and turning. When caring for your mattress, simply use the handles provided for ease of use.

5 Year Guarantee
5 Year Guarantee

For your peace of mind

Handcrafted in the UK
Handcrafted in the UK

Expertly handcrafted in the UK. This product helps to support our economy and helps to reduce environmental impact.

Fire Resistant
Fire Resistant

This product conforms to BS7177: 2008, for use at home

National Bed Federation Approved Brand
National Bed Federation Approved Brand

For the highest standards of quality and safety

Reviews

4.7/5

out of 74 reviews onTrustpilot logo

Trustpilot product review stars
5 Trustpilot starsJan
12 February 2026

Excellent.

Verified Purchase

5 Trustpilot starsMrs Hansen
7 January 2026

Very pleased with this comfy mattress. This is the second time I have bought from Mattressonline. Great service.

Verified Purchase

5 Trustpilot starsMr. Clegg
31 December 2025

I like the firm sides. I have only had it about one month but so far it is much better than what it replaced. I've had to buy deeper fitted bottom sheets so if you are going to buy one just check your bottom sheets.

Verified Purchase

5 Trustpilot starsCarol
31 December 2025

Mattress is really comfortable. Great value for money. Really easy to order. The delivery companys men were the only let down would not take to the bedroom just left in hallway. They didn’t even speak.

Verified Purchase

5 Trustpilot starsVictoria
20 December 2025

Very comfy mattress. Quite firm but we’re really pleased with it

Verified Purchase

5 Trustpilot starsHarminder
15 November 2025

Excellent comfortable mattress at a good price Shopping experience was simple and effortless and good communication from Mattress Online retailer

Verified Purchase

5 Trustpilot starsMargaret
11 October 2025

Ordering was easy. Price very competitive. Delivery was well organised and I was kept informed throughout. Mattress was of excellent quality at a great price.

Verified Purchase

4 Trustpilot starsTrusted Customer
11 August 2025

It's so comfort, but it will bounce back when someone is moving next to you.

Verified Purchase

5 Trustpilot starsIn
2 April 2025

The mattress is super comfy.

Verified Purchase

5 Trustpilot starsTrusted Customer
24 February 2025

Very quick delivery, happy with my mattress

Verified Purchase

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