The oxford shirt made its debut very early on in Ralph Lauren’s designs, and since then it has solidified its status as a pillar of the Polo look. The fabric is developed with a secret wash that gives it instant character, ease, and a heathered softness—what Polo calls the perfect “rumple.” The formula is so unique, it’s been kept in a safe for more than three decades. Today, Mr. Lauren continues to create countless variations of his iconic shirt, including this plaid version that is brushed for added softness.