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Sealy Alford Advantage Mattress

Sealy Logo
From£314.95

up to

25% off

Comfort trial

Comfort fillings

Firmness rating

Support system

Experience a deep restful sleep with the Sealy Alford. Designed with unique PostureTech Core Support coil springs, offering deep-down targeted support.

Reasons to Buy

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.

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.

Soft White Fibres
Soft White Fibres

Soft synthetic fillings create an incredible cosy feel. These fillings are durable and resilient, maintaining its shape and quality. A great balance between comfort and value for money.

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.

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!

Firm
Firm

Firmer and more supportive

24cm deep
24cm deep

About 9.4 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.

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

Description

Fall into a heavenly sleep with the Sealy Alford Advantage Mattress. Designed with support that has got your back!

Exclusive to Mattress Online, you won't find a mattress like this anywhere else!

The Sealy spring

In the core of this mattress is Sealy's very own PostureTech Core Support coil spring system. These springs are designed to gradually get firmer the longer you lay on the mattress. Providing support that targets pressure points deep down, relieving aches and pains.

Plush fillings

This mattress is topped off with plush fillings made of synthetic fibres. These fibres cushion the hardest parts of your body, like your hips and shoulders, to provide you with the perfect amount of relaxation. The sumptuous filling layer provides the comfort that's needed for a dream-worthy sleep.

A sturdy feel

The Alford has a sturdy, firm feel. So, you'll always get the support you need. A firmer mattress is ideal for people who have back problems or if you need extra support.

If a firm feel isn't for you, why don't you check out the Sealy Waltham Latex Advantage Mattress for a medium feel.

Simple care

This mattress is single-sided so you will never have to flip it. To care, simply rotate the mattress top to toe every month. This helps to reduce the settlement of the fillings.

Sustainability first

No need to worry. The Alford Advantage is 100% recyclable at the end of its use. No part of this mattress goes to landfill so you can rest easy and buy with confidence. To top it off, it comes with a 5 Year Guarantee, Sealy has got you covered during this period.

Benefits

  • Exclusive to Mattress Online!
  • Unique PostureTech Core Support coil spring system
  • Sealy's clever springs support the heaviest parts of your body
  • Offers soothing pressure relief where you need it most
  • Lavishly filled with soft white fibres
  • A firm feel for ultimate support
  • Single-sided for easy care
  • Simply rotate top to toe every month for long-lasting comfort
  • Luxuriously quilted
  • Stunning knitted cover
  • 100% recyclable at the end of its life
  • Depth: 24cm
  • 5 Year Guarantee

    Weights: Single: 16.5kg, Double: 24kg, King Size: 28kg, Superking: 33kg

60-Night Comfort Trial

This mattress comes with a 60-Night Comfort Trial - like all of our mattresses!

The trial lets you test your mattress for up to 60 nights. If it's not quite right for you, you can exchange it for a new one.

It can take some time to get used to a new mattress, which is why we ask you to sleep on your mattress for 30 nights. If you're not happy with the feel after 30 nights, simply contact our Customer Service Team, and we'll arrange a mattress exchange.

Click here for more info about our 60-Night Comfort Trial.

Videos

Sealy Alford Advantage Mattress

Specification

FirmnessFirm
Comfort fillingsSoft White Fibres
Support systemPostureTech Core Support Springs
CoverKnitted cover
Pressure reliefYes
Single-sidedYes
Guarantee5 years
Awards & accreditationsHandcrafted in the UK, Approved by the National Bed Federation
Fire resistanceConforms to BS7177: 2008, for use at home
DownloadsSealy Product Care and Guarantee

Dimensions

SizeWidthLengthDepth
Single90cm190cm24cm
Double135cm190cm24cm
King Size150cm200cm24cm
Superking180cm200cm24cm

Please allow for a tolerance of +/- 2cm

Delivery

The following delivery methods apply to mainland England and most of Scotland, Wales and Northern Ireland. Please read our delivery page for more information.

Next day delivery (weekdays only)

Order before

FREE

Weekday of your choice

Order up to 60 days ahead

FREE

Weekend

On Saturday or Sunday of your choice

£17.50

Delivery to the front door of your building

Free upgrade for King Size and Superking to your room of choice

Yes

Two-hour delivery time slot

We’ll let you know on the day before your delivery

Yes

Call to let you know we’re on our way

On your delivery day

Yes

Delivery to your room of choice

Free upgrade for King Size and Superking

£20.00

Mattress recycling

We'll take away your old mattress

£35.00

Delivery is on an all-day service, 7am - 8pm for mainland England and most of Scotland, Wales and Northern Ireland.

Need further information? Please visit our Delivery page.

Reviews

4.6/5

out of 747 reviews onTrustpilot logo

Product review stars

Customer Reviews Summary

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4 starsPhilip
31 October 2025

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5 starsLee
16 May 2025

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5 starsMargaret
29 April 2025

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5 starsAndrew
18 March 2025

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5 starsDavid
2 March 2025

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6 January 2025

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5 starsGillian
12 December 2024

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4 starsSotirios
7 December 2024

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5 starsVikki
5 November 2024

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5 starsSteve
17 October 2024

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