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

Shoppers have been raving about Marks and Spencer
Shoppers have been raving about Marks and Spencer's thermal range.

Heatgen™ Thermal Leggings

Heatgen™ Medium Fleece Thermal Top

Heatgen™ Medium Thermal Long Sleeve Top, M&S Collection

M&S thermals help woman keep heating off for hours in 'impressive

Heatgen™ Medium Fleece Thermal Top, M&S Collection

Heatgen™ Thermal Vest (6-16 Yrs) – Marks & Spencer Bermuda

I tested the popular M&S thermals and didn't need to turn on

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

Heatgen Thermals, Lingerie