These extreme condition salopettes are made with Pertex Endurance to provide a windproof, highly breathable & water resistant shell. Insulation is provided by 350g of 850 fill power superior quality European goose down in full box wall construction. Box wall baffles allow the down to reach its maximum loft & stop it from migrating thus ensuring optimum insulation. Full length side zips facilitate easy on & off, essential in extreme conditions & the high insulated bib keeps the vital chest & kidney area protected & movement is made easy with fully articulated knees. Ventilation can be enhanced, should you find yourself overheating, by opening the multiple pullers on the side zips.