100% cotton (Oxford grey: 90% cotton/10% viscose Ash Heather: 98% cotton/2% viscose) RingSpun pre-shrunk combed cotton Piqué stitch Straight fit 1x1 ribbed neck and cuffs Placket with 3 matching buttons Taped neck Certified STANDARD 100 by OEKO-TEX®N° CQ1007/7, IFTH Color shade differences may occur at Dark Grey and Light Royal Blue products