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Sealy Waltham Latex Advantage Mattress

Sealy Logo
From£489.95

up to

30% off

Comfort trial

Comfort fillings

Firmness rating

Support system

Let the resilient comfort of natural latex cradle you into ultimate pressure relieving sleep. Built to last and designed to fit any sleeper.

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.

Latex
Latex

A plush, adaptive material that responds to your body shape for individualised, ideal comfort. Latex actively responds to your body throughout the night for a truly revitalising slumber.

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.

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.

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 to Firm
Medium to Firm

Firmer than a medium mattress for extra support

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

Description

Experience resilient comfort with the Waltham Latex Advantage Mattress from Sealy. Drift off to sleep feeling perfectly supported every single night.

Latex comfort

What really makes the Waltham stand out from the crowd is the top comfort layer of natural latex. One of nature's most durable materials, latex moulds to the shape of your body and will instantly bounce back to its original shape, every time.

It's that ability to hold its form that gives you unrivalled pressure relief. The organic material of latex is naturally anti-allergenic and inherently cooling. Built to outlast any other type of mattress filling you have had before.

Reactive relief

When you combine latex with Sealy's PostureTech Core Support spring system, the results are a super comfy medium support surface. The scientifically developed spring system reacts to the heaviest parts of your body. Each spring becomes firmer under pressure. This gives you that extra pressure-relieving lift, no matter what kind of sleeper you may be.

Sitting pretty

Relax and stretch out right to the edge of your new mattress. With innovative Edge Guard technology, you won't experience that dip or sag when sitting or sleeping on the edge of your mattress.

Deep and snuggly

The plush quilted sleep surface adds the final touch of comfort to the Waltham Advantage. Luxuriously finished in a modern knit fabric design. This mattress not only looks great but will stay fresher for longer.

Handy handles

This mattress is single-sided, so you will never need to flip it over. Simply use the four built-in turning handles to rotate top to toe to ensure maximum comfort and longevity.

Zero landfill

Put your mind to rest. All Sealy Advantage mattresses are 100% recyclable at the end of their use, with no parts ever going to landfill. You can buy in confidence knowing that your mattress is not harming the planet, but you also have a 5 Year Guarantee!

Benefits

  • Part of Sealy's Advantage collection
  • Natural latex comfort layer
  • Latex is ultra-responsive for pressure relieving comfort
  • More durable than any other mattress materials
  • Medium-firm Sealy PostureTech Core Support spring system
  • Suitable for any type of sleeper
  • Edge Guard technology gives maximum sleep space
  • Sit on the edge of your mattress with no sag
  • Quilted sleep surface for added softness
  • Single-sided - no need to flip
  • Four built-in turning handles
  • The modern knit design cover improves freshness
  • Fully recyclable at its end of life
  • Depth: 29cm
  • Made in the UK
  • 5 Year Guarantee

    Weights: Single: 19kg, Small Double: 25kg, Double: 28kg, King Size: 32kg, Superking: 38kg, Superking Zip and Link: 40kg

60-Night Comfort Trial

This mattress comes with a free 60-night comfort trial - like all of our mattresses!

The trial allows you to test your mattress for 60 nights, and if you don't like it, you can swap it!

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 don't like the feel of your mattress after 30 nights, simply get in touch! We'll be happy to swap it for you.

Click here for more info about our 60-night comfort trial.

Specification

FirmnessMedium to firm
Comfort fillingsLatex
Support systemPostureTech Core Support Springs
Edge supportYes
CoverKnitted cover
Pressure reliefYes
Turning handlesYes
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
Single90cm190cm29cm
Small Double120cm190cm29cm
Double135cm190cm29cm
King Size150cm200cm29cm
Superking180cm200cm29cm
Superking Zip and Link180cm200cm29cm

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 Small Double, Double, King Size, Superking and Superking Zip and Link 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 Small Double, Double, King Size, Superking and Superking Zip and Link

£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

4.7/5

out of 48 reviews onTrustpilot logo

Product review stars

Customer Reviews Summary

summarised by AI

3 starsPaul
11 March 2026

Verified Purchase

Reply from MattressOnline.co.uk, 3 days ago

Hi Paul I am sorry you are not finding your mattress comfortable - we appreciate the feedback. The mattress you have purchased does come with a 60-night Comfort Trial; if you are not finding it comfortable you would be more than welcome to exchange this for something more suitable. If you would like to make contact with our Customer Service team on 01709 780881 or customerservice@mattressonline.co.uk, we can discuss the options with you. Kind regards Charlie

5 starsMrs Mccafferty
24 February 2026

Verified Purchase

5 starsJoanne
11 August 2025

Verified Purchase

5 starsDee-dee
24 July 2025

Verified Purchase

5 starsLisa
30 June 2025

Verified Purchase

5 starsIan
9 October 2024

Verified Purchase

5 starsDavid
25 February 2024

Verified Purchase

5 starsKa
11 January 2024

Verified Purchase

5 starsDavid
17 December 2023

Verified Purchase

5 starsDavid
29 October 2023

Verified Purchase

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