100% cotton. 1x1 rib. Racer back. Double needle finish. Certified STANDARD 100 by OEKO-TEX®N° CQ1007/7, IFTH. Essential and timeless racerback tank top. 12 colors available. 100% cotton construction for a soft and pleasant wear. Do not bleach|Thin laundry 30°C moderate cycle|Do not tumble dry|Iron at low temperature|||||