Heatgen™ Medium Thermal Long Johns, M&S Collection

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. Our 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. We only ever use responsibly sourced cotton for our clothes.
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. Our 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. We only ever use responsibly sourced cotton for our clothes.

Heatgen™ Medium Thermal Long Johns

Heatgen™ Maximum Thermal Long Johns M&S Collection M&S

Browse our Men Thermal Products

Buy Women Heatgen Thermals

When the temperature drops, beat the chill in our thermal long johns. Regular fit with an elasticated waist and cuffed bottoms for snug and secure

Heatgen™ Maximum Thermal Long Johns

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Marks and Spencer Men's 2 Pack Heatgen Lightweight Thermal Pants, Denim, Large at Men's Clothing store

Buy Women Heatgen Thermals

Marks and Spencer Men's 2 Pack Heatgen Lightweight Thermal Pants, Denim, Large at Men's Clothing store

Marks and Spencer Men's 2 Pack Heatgen Lightweight Thermal Pants, Denim, Large at Men's Clothing store

Heatgen™ Medium Thermal Fleece Joggers, M&S Collection