Sealy Sark Mattress |

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Medium Firm
Sealy Sark Mattress
Sealy Sark Mattress
Sealy Sark Mattress
Sealy Sark Mattress
Sealy Sark Mattress thumbnail
Sealy Sark Mattress thumbnail
Sealy Sark Mattress thumbnail
Sealy Sark Mattress thumbnail

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Sealy Sark Mattress


List Price £XXX.XX
30cm Depth 1000 Spring Count Geltex Pocket Springs

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Features you'll love

Tencel, Purotex and Adaptive technology create a cooler environment for a healthier night’s sleep

1000 individually pocketed springs work independently to provide tailored and responsive support

Geltex triple benefits of breathability, pressure relief and total body support

Firmness: Medium Firm – ideal for those who suffer from back pain

Mattress depth: 30cm created by layers of fibres with a sprung core

Quilted for a smooth finish and softer touch


Since 1881, Sealy has been at the cutting edge of mattress development. Today, they are one of the world’s most respected brands, producing premium quality products like the Sark mattress, a medium-firm option that’s ideal for those who prefer a firmer feel or suffer from back pain. With a thousand individually pocketed springs working in harmony to respond to every move you make, you’re assured of a bespoke level of cushioning and support for a more restful and tranquil night’s sleep. Innovative technology keeps you cooler, more comfortable, and more relaxed, so there’s less wriggling and more snuggling!

1000 individually pocketed springs respond to your every move

Although they each form part of a complex and carefully designed matrix, the 1000 springs in the Sark mattress sit in their own individual pockets, so they can also work independently of their neighbours. That allows each spring to respond to every micro-movement you make, continually adjusting and correcting to accommodate your body and provide it with flawless support. The additional layers surrounding this core spring matrix provide extra padding and cushioning.

1000 individually pocketed springs respond to your every move image
Smart fibres create a smarter mattress image

Smart fibres create a smarter mattress

As well as a complex spring core, the Sark mattress from Sealy also incorporates some clever modern fibres to minimise moisture and eliminate allergens, creating a healthier environment. The Sark uses a combination of Purotex and silky smooth, soft Tencel fibres and Adaptive technology to keep you cooler and fresher. Purotex is endorsed by Allergy UK and is ideal for those who suffer from dust-triggered asthma or rhinitis.

Geltex prevents pressure points

The use of Geltex as a key component of the Sark mattress helps to distribute your weight more evenly across the mattress, eliminating pressure points on those key back, shoulder and hip locations that can lead to more serious back pain. Geltex is also highly breathable and regulates your temperature through the night so you never get too hot or too cold.

Geltex prevents pressure points image

The Sark looks as good as it feels, with a soft quilted surface and a depth of 30cm, so you get more mattress for your money. It’s made in the UK and comes with a 5-year guarantee for your peace of mind. This is a single-sided mattress so there’s no need to flip or turn it, but we do suggest that to avoid lumps or dips from forming the mattress is rotated from head-to-toe every six months.


Pocket Springs

Pocket springs are springs mounted in their own seperate fabric pockets, meaning they work completely independently of one another and can provide your body with better pressure relieving support.


Geltex is a gel-infused foam which increases your comfort and body support. Geltex delivers triple benefits to offer the perfect sleep solution: incredible body support, ideal pressure relief and unrivalled breathability.

Soft White Fibres

Soft white fibre fillings which are made from 100% polyester. This type of mattress filling offers great recovery and is very durable, which means long-lasting comfort.

30cm Deep

This mattress is approximately 30cm deep.

Medium Firm Support

Good for people who change sleeping position.

1000 Springs

This mattress contains 1,000 individually pocketed springs (in a King Size).

Quilted Cover

The quilted cover is created by stitching the mattress cover and the fillings together, creating a patterned comfort quilt layer.

Reinforced Edges

The mattress has reinforced edges, so that the full sleep surface can be used. This means more sleeping space - which is usually lost in conventional, less edge-stable mattresses.

Air Vents

Vents which allow air to flow in and out of the mattress are mounted on the sides. These vents help to keep the air within fresh and cool.

No Need To Turn

A single-sided mattress which does not need to be turned/flipped. One-sided mattresses should, however, be rotated head to toe regularly.

No Roll Together

Individual personal sleeping zones mean that you won't be disturbed if your partner rolls or moves, as you won't feel their motion. There's also no tendency to roll towards the middle of the mattress.

Pressure Relieving

This type of mattress gives maximum pressure relief, allowing your body weight to spread across it evenly. This ultimately means less tossing and turning throughout the night and a more relaxing and restful sleep.

Turning Handles

Flag-stitched handles are attached to the sides of the mattress to assist in turning or rotating.


Being hypoallergenic, this is the perfect item for allergy sufferers - or anyone looking for a healthy night's sleep.

NBF Approved Product

Peace of mind and reassurance - the manufacturer of this item is an approved member of the National Bed Federation's Code of Practice.

Made in the UK

This item has been manufactured in the UK.

Fire Resistant - Low Hazard

This product conforms to the BS7177: 2008 standard for domestic use (low hazard) - ideal for use at home.

Warranty & Guarantee

Sealy 5 Year Guarantee

In the unlikely event of a defect in material or workmanship occurring within the 5 year guarantee period, we will arrange to repair or replace the item under complaint free of charge at our discretion.

Download warranty/guarantee information


Most of our mattresses are available for free next day delivery. Order before 5pm, and we will dispatch your mattress or bed the same day, for free next day delivery. You can also select another day of your choice in your basket. Don't forget to check out our range of additional services like room of choice delivery & mattress recycling - where we take your old unwanted mattress away.

About Sealy

For over 100 years, Sealy has been one of the world’s leading manufacturers of premium quality mattresses and beds. Each product has been designed with you in mind, aiming to provide you with exceptional comfort and the support you deserve to sleep soundly every night. At MattressNextDay, we’re proud to stock this prestigious brand.

To make sure your mattress meets your individual requirements, you can pick your preferred firmness rating, including soft, medium and firm, and you choose the size you need. We stock sizes small single, single, small double, double, kingsize and superking, so whether you need a mattress for your spare room or your own boudoir, we’ve got you covered.

Our Sealy mattresses are available with a range of useful and innovative features too. From memory foam filling, to posture support, to hypoallergenic qualities, to pressure relief technology, you won’t struggle to find the perfect mattress when you shop from our selection of Sealy products.

To accompany your mattress, why not go for one of our Sealy beds too? We have a range of models for you to pick from, including our popular Sealy divan beds.

Need more information? Get in touch with us today. Our bed specialists are on hand to answer your questions. Simply give us a call or fill out our online contact form. With free next day delivery on all orders over £150 placed before 5pm, you could be enjoying your new bed setup much sooner than you think.

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Delivery Upgrades

Old Mattress Removal

We'll take away your old mattress when we deliver your new one, and then recycle it.

Room of Choice Delivery

We'll take your item to your preferred room of choice within the property.

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