Silentnight Heat Genie 2cm Mattress Topper - Kingsize
320/8469£45.00
Bed size: King Size
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About this product
Add extra warmth to your bed with this self-heating mattress topper that uses heat-reflecting technology to keep you comfortable through colder nights. The three-layer construction combines a heat-reflecting foil with a thermal lining and a deeply filled quilted top layer, providing 7.5 tog of warmth without needing electricity. It's designed for king size beds and fits easily over your current mattress with elasticated corner straps that grip securely and stay in place. The heat-reflecting foil works with the thermal lining to trap warmth naturally, so you can stay cosy without extra heating.
The elasticated straps make fitting quick and straightforward, even on thicker mattresses. It's machine washable at 40C and tumble dryer safe, so keeping it fresh is simple and practical. The deeply filled quilted top layer feels soft and supportive, while the thermal lining helps retain heat throughout the night. Whether you're looking to add warmth to your bedroom or reduce reliance on heating, this topper delivers comfort and functionality you can count on.
- Set includes: 1 Mattress Topper.
- Suitable for king size beds.
- Size L203, W153, D4cm.
- Cover made from 100% Polyester.
- Non woven reverse.
- 100% Polyester filling.
- Secured by elasticated corner straps.
- Cover is machine wash as synthetic at 40C and suitable for tumble drying.
- EAN: 5012701569408.
4.4
35 reviews
79%
Recommended this product
Customers Say
The mattress topper effectively retains body heat, providing warmth and comfort for a restful night's sleep. Users appreciate its softness and insulation properties, although some find it thinner than expected.
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.
Really does feel warm from your body heat
This really does keep us warm. You can feel the warm areas where you’re lying compared to the rest of the topper. It’s not very thick, but does add some comfort, but its main use is the warmth. Loved it so much I bought another for our camper van.
Mrs S, 65 or over, Torbay Devon
Good for many aspects of health problems
Bought this as first one worn out it’s fantastic keeps bed warm and remains warm when nipping to the loo at night excellent for arthritic joints
Doto, 65 or over
Comfortable and works as intended
I bought this to replace a electric heated mattress topper that heated up nicely but wasn't particularly padded. My current mattress is not that great and I wanted to be able to add some padding and still stay warm. This does the job perfectly for a reasonable price. Sure, it's not as warm as a constantly heated electric topper, but it insulates very nicely with body warmth and costs nothing to use. It's also a soft and pleasant addition and I can no longer feel the springs of the mattress below me.
RR, 45 - 54, Newcastle
Very soft and cosy mattress topper.
I needed a mattress topper and was intrigued by it using body heat to warm the bed, very impressed by softness of the topper and not sure if it gets warm as I have just dropped off to sleep straight away since using it! As someone who tosses and turns this is a bonus and can recommend it if you have trouble getting to sleep.
Ruthie, 65 or over, Norfolk
Warm and comfortable
I bought this because my mattress has a cooling cover which was great in the summer but now takes the heat out of my body. The topper really makes a huge difference and is comfortable.
DaveC, 65 or over, Dartford, Kent
This mattress topper really works
Bought this as the weather was getting colder and it really works. Radiates your own body heat - magical.
Gill, 55 - 64, Middlesex England
Ideal for the winter months
I bought this a couple of weeks ago and it was well worth the money. It has added extra comfort and warmth to my nights sleep.
ATSheffield, 45 - 54, Sheffield
Super-comfy & cosy mattress topper
Just changed over to this Winter weight self-heating mattress topper. Have turned off the radiator in our bedroom, as we are right above the lounge, with radiator & open fire.
Ellies25, 65 or over, Belfast
Helps me sleep
I bought this a month ago due to feeling springs in my mattress which was affecting my sleep, after purchasing and using I have slept so much better
Marcus, 25 - 34, SOUTHEND
Save's energy
Excellent value for money as keeps you nice and warm so good value for money
hmcd1, 65 or over, Southampton
Hey Kieran,
I can advise that this is not an electric heated product, it doesn't read certain temperatures. It features a heat reflective foil that retains heat without the use of electricity.
Thanks for using Q&A.
Hello there,
Silentnight Heat Genie Self Heating Mattress Topper Kingsize
It's recommended to fit the topper first onto the mattress, then add the mattress protector, and finally the sheet.
Thanks for using Q&A
Hello Sunshine.
After checking with our supplier, they have advised for Silentnight Heat Genie Self Heating Mattress Topper Kingsize.
This is not Waterproof.
Thank you for using Q & A.
Hi Lilyhammer,
The Silentnight Heat Genie Self Heating Mattress Topper in the double size measures L193 x W137 cm. A small double bed typically measures L190 x W120 cm, so the double size topper would be too large for your mattress.
Thank you for using Q&A
Hello LondonGal,
The supplier has advised the following for the Silentnight Heat Genie Self Heating Mattress Topper Kingsize:
“ Yes this is fine to be used with a mattress protector underneath. The product is designed to reflect heat upwards, there would be no change to product use. ”
Thanks for using Q&A.
Hello Peaches.
After checking with our supplier, they have advised Silentnight Heat Genie Self Heating Mattress Topper - Single:
The polyester outer cover and hollowfibre filling are inherently flame-retardant materials that pass UK regulations without needing any flame-retardant chemical.
Filling on Toppers flame-retardant only. The label should confirm the following: All fillings in this product meet the furniture & furnishings (fire) (safety) regulations.
Thank you for using Q & A.
Hello Josh,
Silentnight Heat Genie Self Heating Mattress Topper - Single.
The depth of the Silentnight Heat Genie Self Heating Mattress Topper - Single is 2cm.
Thanks for using Q&A
Hello Molly,
The supplier has advised the following for the Silentnight Heat Genie Self Heating Mattress Topper - Single:
“ An electric blanket may be used with this topper however it should be used with more care as the topper will reflect the heat back quicker than a standard topper therefore a reduce warm up time on high settings in recommended. The topper must be on the bottom and not on top of the electric blanket. ”
Thanks for using Q&A.
Hello there,
The supplier has advised the following for the Silentnight Heat Genie Self Heating Mattress Topper - Single:
We can confirm that there will be no noise from the product having foil.
The product is breathable, but is not waterproof.
Thank you for using Q&A.
Hello Jimmy45,
The supplier has advised the following for the Silentnight Heat Genie Self Heating Mattress Topper - Double:
“ This product cannot be used on top of an electric blanket. We would not recommend using a topper on top of a Silentnight electric blanket, as this may become trapped, and the heat will not be felt through the topper. ”
Thanks for using Q&A.
The small print
*Prices correct as displayed but are subject to change.
The customer and brand answers you’ll see above are submitted independently. As we don’t review these answers, we can’t 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.