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Small Item Delivery £4.95, free over £100
Large Item Delivery £9.95
A year of fast delivery with Argos Plus

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Mattress toppers

King Size Mattress toppers

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37 products

Silentnight Anti-Allergy Mattress Topper 2.5cm -Kingsize

Silentnight Anti-Allergy Mattress Topper 2.5cm -Kingsize

Rating 4.6 out of 5, from 1045 reviews

(1045)

From

£32.00

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Dormeo Octasmart 7cm Mattress Topper - Kingsize

Dormeo Octasmart 7cm Mattress Topper - Kingsize

Rating 4.2 out of 5, from 412 reviews

(412)

From

£259.00

Free Delivery

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Dormeo Octasmart Essential 5cm Mattress Topper - Kingsize

Dormeo Octasmart Essential 5cm Mattress Topper - Kingsize

Rating 4.2 out of 5, from 3787 reviews

(3787)

From

£199.00

Free Delivery

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Dormeo Octaspring Classic 7cm Mattress Topper - Kingsize

Dormeo Octaspring Classic 7cm Mattress Topper - Kingsize

Rating 4.2 out of 5, from 242 reviews

(242)

From

£310.00

Free Delivery

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Silentnight Soft Like Down Mattress Topper - Single.

Need help? Read our mattress topper guide

Silentnight Wellbeing 8cm Mattress Topper -Kingsize

Silentnight Wellbeing 8cm Mattress Topper -Kingsize

Rating 3.9 out of 5, from 33 reviews

(33)

From

£219.00

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*Argos Pay Representative Example

Representative 34.9% APR (variable), 34.95% PA purchase rate (variable), £1,200 assumed credit limit.

Offers and credit subject to status. 18+. UK only. Terms apply. NewDay Ltd is the lender, Argos Limited is the broker.

Panda Memory Foam 5cm Mattress Topper -Kingsize

Panda Memory Foam 5cm Mattress Topper -Kingsize

Rating 4.8 out of 5, from 6704 reviews

(6704)

From

£160.00

Free Delivery

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Silentnight Airmax 8cm Mattress Topper - Kingsize

Silentnight Airmax 8cm Mattress Topper - Kingsize

Rating 4.5 out of 5, from 1458 reviews

(1458)

From

£48.99

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*Argos Pay Representative Example

Representative 34.9% APR (variable), 34.95% PA purchase rate (variable), £1,200 assumed credit limit.

Offers and credit subject to status. 18+. UK only. Terms apply. NewDay Ltd is the lender, Argos Limited is the broker.

Related categories

Super King Mattress Toppers King Size Mattress Protectors Buy Mattress Toppers Online King Size Fitted Sheets King Size Bed Sheets Single Mattress Toppers King Size Memory Foam Mattresses King Size Flat Sheets Simba King Size Mattresses Small Double Mattress Toppers

King size mattress toppers for a more comfortable sleep

Elevate the feel of your existing mattress with a king size mattress topper, an excellent way to enhance your sleep. This added layer brings an added dimension of plushness or supportive bounce to your king size bed, making it into an even more inviting sleep surface. It represents a smart choice if you wish to prolong the life of your mattress or simply upgrade its comfort without investing in a new one.

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© Argos Limited 2026. All Rights Reserved.

*Argos Pay is provided by NewDay Ltd. UK residents aged 18 and over. Offers and credit subject to status. Terms apply.

Argos Limited is a credit broker and not a lender, introducing Argos Pay under an exclusive arrangement with the lender NewDay Ltd.

Argos Limited is authorised and regulated by the Financial Conduct Authority (firm reference number: 713206), registered office: 33 Charterhouse Street, London, EC1M 6HA). NewDay Ltd is a company registered in England and Wales (company number: 7297722), registered office: 7 Handyside Street, London, N1C 4DA. NewDay Ltd is authorised and regulated by the Financial Conduct Authority (firm reference number: 690292) and is also authorised by the Financial Conduct Authority under the Payment Services Regulations 2017 (firm reference number: 555318) for the provision of payment services.

PayPal Pay in 3 is the trading name of PayPal UK LTD, 5 Fleet Place, London, United Kingdom, EC4M 7RD. Terms and conditions apply. Credit subject to status, UK residents only. Argos Limited acts as a broker and offers finance from a restricted range of finance providers. PayPal Pay in 3 is regulated by the Financial Conduct Authority. Pay in 3 eligibility is subject to status and approval. 18+ UK residents only. Pay in 3 is a credit agreement. Check if affordable and how you will repay. May make other borrowing more difficult or expensive. See product terms for more details.

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