100% enzyme-washed combed cotton (Ash Heather: 98% cotton / 2% viscose Oxford Grey: 90% cotton / 10% viscose) Slim fit Neck tape (Oxford Grey contrast neck tape for all colours, except for White body where neck tape is White and Oxford Grey body where neck tape is Dark Grey) Twin needle finishing at the cuffs and hem Certified STANDARD 100 by OEKO-TEX®N° CQ1007/7, IFTH