I tested the popular M&S thermals and didn't need to turn on
![](https://i2-prod.mirror.co.uk/incoming/article28827957.ece/ALTERNATES/s1200/1_DBR_MEN_231222Marks_08jpeg.jpg)
#xa; Keen to find out if she could save on her heating by investing in Marks and Spencer thermals, reporter Dianne Bourne put the layers to the test - and she was amazed by the result
![](https://thetravelhack.com/wp-content/uploads/2014/03/MS-thermal-leginngs-.jpg.jpg)
Reviewing M&S thermals: Staying warm and stylish on the slopes - The Travel Hack
Heatgen™ Medium Thermal Long Johns, M&S Collection
![](https://i2-prod.mirror.co.uk/incoming/article32336745.ece/ALTERNATES/n615/1_SHARON-MAIN.jpg)
I tested the popular M&S thermals and didn't need to turn on heating for hours' - Mirror Online
Best M&S thermals for men and women
![](https://i2-prod.mirror.co.uk/incoming/article28827957.ece/ALTERNATES/s1200/1_DBR_MEN_231222Marks_08jpeg.jpg)
I tested the popular M&S thermals and didn't need to turn on heating for hours' - Mirror Online
![](https://i2-prod.mirror.co.uk/incoming/article28514076.ece/ALTERNATES/r500/0_1.jpg)
I tested the popular M&S thermals and didn't need to turn on heating for hours' - Mirror Online
![](https://i2-prod.walesonline.co.uk/incoming/article25846856.ece/ALTERNATES/s615/1_DBR_MEN_231222Marks_04jpeg.jpg)
I wore Marks and Spencer thermals instead of turning on the heating' - Wales Online
![](https://m.media-amazon.com/images/I/61IHYeSR-pL.jpg)
10 Best Thermal Underwear 2024, Tested by Experts
Heatgen™ Medium Thermal Long Johns, M&S Collection
2pk Heatgen™ Light Thermal Long Sleeve Top, M&S Collection
Heatgen™ Medium Thermal Long Johns, M&S Collection
![](https://i2-prod.mirror.co.uk/incoming/article32339146.ece/ALTERNATES/n615/0_MARISHAjpeg.jpg)
I tested the popular M&S thermals and didn't need to turn on heating for hours' - Mirror Online