3.5 oz., 53% cotton, 43% polyester, 4% lycra Fine yarn count shirting True Non-iron performance straight from the dryer stain release finishActive Fit Patented pucker-free taped seams Fused collar, cuffs, and placket Split back seam with bias cut back yoke Straight collar with built-in collar stays adjustable Comfort Collar for up to an inch of stretch at neck left-chest pocket pearlized buttons