



Ideal for staying warm in moderately cold conditions, these M&S Heatgen thermal long johns feature medium warmth and Heatgen technology to generate and retain body heat. Made from a breathable cotton blend, they are an authentic product from the trusted UK retailer M&S.
Stay cosy with these cotton-blend thermal long johns. Regular fit, offering a medium level of warmth. Made from an insulating brushed-back cotton blend that's breathable for extra comfort. Finished with ultra-soft seams for snugness.
M&S' clever Heatgen technology uses an innovative fibre blend, helping your body to generate and retain heat so you can stay warm when the weather gets chilly. Medium warmth for wrapping up in moderately cold conditions.
Machine washable. Tumble dry. 50% cotton, 26% polyester and 24% viscose (exclusive of trimmings).