INTRODUCING POPLIN MELANGE SHIRTS. This is our favorite spring/summer solid shirt. The yarns we use are called mélange, which is a process in which different shades of the same color are mixed before the yarns are spun. This creates the uneven heather shades which give a depth to the colors as well as a soft, relaxed look to the shirts. We offer a lot of mélange in the fall season, but here it’s done in a lightweight poplin fabric and we’ve used a lighter spring color palette to create a group of unique and flattering solid shirts.