Barbour s Heritage+ line offers contemporary, highly functional takes on the brand s classic styles styles that were once relied on by the working people of the North East. The Modified Durham Wax Jacket is built for all seasons, made from the brand s iconic waxed cotton with a traditional tartan lining. 100% Cotton (Waxed), Zip & Snap Button Closure, Patch Pockets, Adjustable Hem, Barbour. Barbour Men's Heritage+ Modified Durham Wax Jacket Archive Olive.