3.4 oz., 55% cotton, 45% polyester; Fine yarn count shirting; True Non-iron performance straight from the dryer; stain release finish; Active 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;