Ventile is a densely-woven cotton developed for RAF pilots in WWII, engineered to keep aircrew alive when they ditched into the North Sea. Private White V.C. has been making jackets from it for years, and the current Harrington 3.0 is the best version yet.
The updates matter: a stand collar replaces the old rib-knit trim, RIRI copper zip hardware throughout, and a raglan sleeve cut gives proper arm movement. British Racing Green is the colourway to buy. It sits between navy and forest - dark enough to work as a jacket over a suit, distinctive enough to read as intentional.
Everything is cut and sewn at the Private White factory on Cottonopolis Street, Manchester. The same factory has been producing British militaria and workwear since 1796. At £695 this is not cheap, but the jacket will outlast most things you own.