I wore Marks and Spencer thermals instead of turning on the heating' - Wales Online

Can layering up in M&S thermals help you save on heating bills?

Heatgen™ Medium Thermal Long Sleeve Top

I wore Marks and Spencer thermals instead of turning on the heating' - Wales Online

Heatgen™ Thermal Leggings

2pk Heatgen™ Light Thermal Long Sleeve Top

2pk Heatgen™ Thermal Light Built-up Shoulder Vest, M&S Collection

9 best thermals for women to keep warm and cosy: From M&S to John Lewis

9 best thermals for women to keep warm and cosy: From M&S to John Lewis

B&M selling XXL energy saving thermal blanket for £18 amid 40% off sale - Chronicle Live

2pk Heatgen™ Thermal Light Built-up Shoulder Vest, M&S Collection

M&S just launched £35 'cosy' thermal jeans – and they're a winter wardrobe essential - OK! Magazine

The Best Winter Thermals for Women