100% combed cotton pique - washable at 60°C (Oxford Grey: 90% combed cotton piqué/10% viscose - washable at 40°C) Flat knit rib Oxford Grey contrast taped neck and side slits for all colours, except for Oxford Grey body where tape neck is Dark Grey 2 button placket Twin needle finishing at the hem Certified STANDARD 100 by OEKO-TEX® N° CQ 1007/7, IFTH Color shade differences may occur at Dark Grey and Light Royal Blue products