3.4 oz. (US), 5.7 oz/Lyd (CA), 55/45 cotton/polyester. Fine yarn count shirting. Stain-release and wrinkle-free finish. Classic fit. Rolled button-down collar with pearlized buttons. Adjustable "Comfort Collar" gives up to an inch stretch at neck. Patented pucker-free taped seams. Specially fused collar, cuffs and placket. Split back seam with bias cut back yoke. Left chest pocket.