About Peter Millar Founded in 2001, the Peter Millar line of fine clothing and accessories has become in just a few years the standard-bearer for discerning and demanding individuals on the golf course, in the office, and on the town. From the original signature cashmere sweaters to a wide range of casual and formal wear, the Peter Millar line embraces a classic old-world style, resplendent in sharp detail, superb craftsmanship, and only the highest quality materials.