I dressed all over in M&S thermals to see if it saved putting the

180 Denier Heatgen™ Footless Tights, M&S Collection

M&S thermals help woman keep heating off for hours in 'impressive' test - Daily Record

Heatgen™ Medium Fleece Thermal Top, M&S Collection

Money-saving pick of the week: £20 thermal set tops list as it'll 'keep you warm in freezing weather' - Mirror Online

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

This lightweight long-sleeved thermal top is designed to keep you extra warm when the temperature drops. Heatgen Plus™ fabric is brushed on the inside

Heatgen™ Medium Thermal Long Sleeve Top

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

I tried Shein's £4 sheer thermal tights - and you'd be a fool not to get them yourself - Charlotte Smith - Bristol Live

I tested £12 bargain thermals - one item will help me stay warm at

Add a cosy extra layer with this lightweight thermal top. Long-sleeved style with added stretch for exceptional comfort. Super-soft Heatgen Plus™

Heatgen™ Medium Thermal Long Sleeve Top

Shoppers excited by 'cosy collection' at M&S which saves you from putting the heating on - Mirror Online