Inspired by the closely woven linen smocks of local shepherds he designed a cotton fabric, which was waterproofed both in the yarn and then in the final fabric.
During the Boer War officers begin to wear Burberry raincoats, which persuaded the War Office to give official approval and the coat model Trench 21, specifically designed for World War I trench warfare was produced in 1914.
The original raincoats were yellow with capes, the kind you still see on public servants during rainstorms.