M&S thermals are saving people from turning on the heating this

The Marks and Spencer Heatgen thermal tops use technology that helps the body generate and retain heat. Customers are saying they are so warm, they can turn down their heating.

I tried B&M's cheap thermals and they rival M&S for keeping warm - Manchester Evening News

Staying warm never looked so good, thanks to this sparkly thermal top. The long-sleeved style has a new and improved stretchy feel for even more

Heatgen™ Medium Thermal Long Sleeve Sparkle Top

20+ Ways To Save Money On Your Heating and Stay Warm This Winter

M&S thermals are saving people from turning on the heating this winter

B&M's 'energy-saving' £35 heated throw that is shoppers' 'idea of heaven' - Daily Record

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Marks and Spencer Heatgen review: We dressed heat-to-toe to test thermals

Asda and Primark thermals compared to M&S version - with clear winner - Leicestershire Live

I tried hi-tech thermals from Columbia to beat the chill - but are they as good as M&S? - Dianne Bourne - Manchester Evening News