Slumberdown Airstream 4.5cm Mattress Topper - Kingsize
539/9675Ā£105.00
Bed size: King Size
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About this product
Sleep cooler and more comfortably with this 4.5cm mattress topper that fits neatly over king size beds. It's made with Airstream Memory technology that reduces heat build-up, so you'll feel fresher throughout the night than with traditional memory foam. The springy construction lets you move freely in bed, which supports your body's natural repair process while you sleep. Elasticated corner straps hold it securely in place without constant adjusting, and the fitted design sits neatly over your mattress. The breathable fibres allow air to flow freely, keeping you cooler as you rest.
The cover is machine washable at 40C, so keeping it fresh is straightforward and practical. The filling bounces back after use, maintaining its supportive feel night after night. It adds a layer of comfort to your existing mattress without slipping or shifting around. Whether you're refreshing an older mattress or adding extra comfort to a newer one, this topper delivers pressure relief and cooler sleep that works hard every night.
Part of the Slumberdown Memory Filled Bedding collection.
- Suitable for king size beds.
- D4.5cm.
- Cover made from 100% polyester.
- 100% polyester filling.
- Fitted.
- Secured by elasticated corner straps.
- Cover is machine washable covers at 40C.
Returns
If you want us to collect an unwanted small item after delivery, it costs £3.95 or you can return it to any store for free. You won’t be charged if the item is faulty, or if it was delivered by a supplier.
4.4
577 reviews
85%
Recommended this product
Customers Say
Mixed reviews on comfort and quality; some find it improves mattress comfort and reduces pain, others criticize thinness, size issues, and misleading memory foam claims.
An AI generated summary based on recent customer reviews
Each review is verified as authentic by our independent third party and we only publish reviews from customers or Argos Testers who have purchased or used the item. Customers are incentivised to submit product reviews as part of a prize draw.
Impressed
Looks and feels good
Molly, 65 or over
Rubbish!!!!
Absolute waste of money. Thin cheap quality
Katefromkemt, 35 - 44
Good quality mattress protector
Pleased with m/protector purchase and have used at home over a hard mattress and this help pad it out for comfort. Also used it at family members house as bed quite soft and therefore the product helped give my back the support I require as have back disc issues. š the mattress protector although not too thick it is perfect for what I require.
Sweety34, 55 - 64
Not great
Too thin and doesn't make much difference. I searched for memory foam and it was a bit misleading ads it is jot really that. Quite overpriced for what it is. Unfortunately you cannot return it. Argos delivery is always great though.
LPS, 55 - 64
Could do with a better zip.
Fits well and works as expected but as the zip is plastic this broke in the first few weeks so the insides keep falling out and needs adjusting every few days.
Irislou22, 25 - 34, Derby
dipped after 1 month, very thin
very thin, dipped after 1month of usage.
Dan, 35 - 44, Reading
Excellent product
We bought this to put on a new mattress that turn was too firm. It has made for a much more comfortable sleep. Well worth the money.
Andy, 55 - 64, Cornwall
Great matress topper
Very happy with this mattress topper - perfect for my sons student bed. Previously he had the Argos one which is also very good but he thinks this one is better.
Emma, 45 - 54, Bristol
Exactly as described
Item was delivered on time and was exactly as described. Great product
Griffcrocker, London
Slumberdown
Soft and relaxing as it can be. Used it less than a month but I think my waist is less sore
Viv, 35 - 44, Larne
Hi there,
For full details of our returns policy please see the link below:
https://help.argos.co.uk/help/refunds-&-retur...
Thanks for using Q&A
Hi Jan,
The Slumberdown Airstream Memory Fibre Mattress Topper is designed to be odor-free. Reviews indicate that it does not emit the unpleasant chemical smell often associated with memory foam products.
Thank you for using Q&A
Hello bannanie,
The supplier has advised the following for the Slumberdown Airstream Memory Fibre Mattress Topper - Double:
Yes, you can use this with an adjustable bed.
Thank you for using Q&A.
Hello Mrs S,
The supplier has advised the following for the Slumberdown Airstream Memory Fibre Mattress Topper -Kingsize:
"We would always suggest buying the correct size for the bed you have. Our topper sizes are inline with the rest of the market." So please purchase the size that matches that of your mattress.
I hope this helps.
Thank you for using Q&A.
Hello there,
The supplier has advised the following for the size of the Slumberdown Airstream Memory Fibre Mattress Topper - Double (and the king sized one too):
- DOUBLE: 135cm x 190cm
- KING: 150cm x 200cm
(As a secondary bit of info, they confirmed the following for the size of the single: 90cm x 190cm. Also, all figures given, due to the nature of the product, are approximate: -0/+3%).
I hope this helps.
Thank you for using Q&A.
Hi Anonymous
This Slumberdown Airstream Memory Fibre Mattress Topper would be slightly bigger in width only. Double sized mattresses are 4ft 6in whereas a small double mattress is 4ft. If you place in the centre there would be a 3in overhang each side.
I hope this helps
Thank you for using Q&A
Hi Claire,
This gives a firm support, however it is springy.
Thank you for using Q&A.
Gem
Hello there,
The Slumberdown Airstream Memory Fibre Mattress Topper - Double is made in the UK.
I hope this helps.
Thank you for using Q&A.
Hello Louise,
After checking with our supplier they have advised: This will not make you cold, it's designed to wick away moisture so that you stay cool and dry. The airstream support pad gives the same support as memory foam without the heat build up, again allowing you to stay cool and dry.
Hope this helps.
Thanks for using Q&A.
Hello Elle,
This memory foam topper does help reduce heat build up during for night for a more comfortable sleep.
I hope this helps
Thank you for using Q&A
Hi this mattress topper is very comfortable. Keeps the right temperature.
The small print
*Prices correct as displayed but are subject to change.
The customer and brand answers youāll see above are submitted independently. As we donāt review these answers, we canāt take responsibility for anything they may say. The responses from Argos colleagues are accurate at the time of publishing. For the latest info, you should check the product page.