Handmade in England, Jago jackets are constructed of a classic weather-resistant fabric called Ventile, a weatherized cotton canvas used back in the day by Everest pioneers and WWII Spitfire Pilots. Everything else about these all-weather jackets is thoroughly modern: they are windproof, breathable & water-resistant, featuring contemporary fit, reinforced forearms, durable threads & heavy grade YKK zips, welted pockets, & underarm stretch paneling.