EXCLUSIVE AT MR PORTER. The costume director for the latest Kingsman film, set in WWI, told The Journal: "We were surprised that with just a few tweaks of classic styles from the early 20th century, you could create something timeless and modern." Made from cotton Oxford, this shirt is cut slim with a button-down collar and a box pleat at the back for extra room through the shoulders. Style with jeans or smart tailored trousers.