40 Years In The Making.


The Mountain Equipment Lightline Jacket - It’s been to 7 continents, used on countless first ascents, and helped to define what a down jacket is capable of. And this year it turns 40. Before the Lightline, down jackets were the domain of cutting-edge high altitude mountaineers; a specialist and niche product. But from 1977, things changed.



  • Lightline Jacket 40th Anniversary
    Our Iconic And Continuing Bestseller

    Built to meet the demands of modern mountaineers, the Lightline Jacket continues to set the benchmark for lightweight, technical duvets. Benefiting from improved fit and an outstanding new hood it offers exceptional warmth and protection in sub-zero conditions.


    View Men's Lightline Jacket


    View Women's Lightline Jacket


Becoming the staple technical duvet of climbers, mountaineers and hikers the world over, the Lightline Jacket predates the Walkman, MS-DOS, and the CD. But unlike them, it is as relevant now as it has ever been.


View Men's Lightline Jacket

View Women's Lightline Jacket


  • Lightline Jacket 40th Anniversary
    Down 700

    Our high-quality duck down has an actual minimum down cluster content of 90% and is DOWN CODEX approved.

  • Lightline Jacket 40th Anniversary
    Drilite® Loft

    Drilite® Loft is an extremely, breathable and water-resistant fabric. A microporous Polyurethane coating provides a hydrostatic head of 1500mm to keep insulation dry in hostile environments.