Micro-Pima and Pima Interlocksome of the softest fabrics on the planet. 55% Pima cotton/45% Micro-polyester, 6.5-oz. with relaxed fit and moisture-wicking. This shirt is non-wrinkle, double-stitched and washed for softness, with a stand-up collar, reinforced seams and taped side vents. Coordinates with Ladies' 8583.