Rayon(bamboo)95%, Polyurethane5% * Pull aside the V-neckline for disceet nursing. The part touches your breast is made with 100% organic cotton.? * Size(cm): S(shoulder32.5, 72～86, 58, 68, 72～88,36), M(34,76～90,60,72,76～92,38) * L(35.5,80～94,62,76,80～96,40), LL(37,84～98,63,80,84～100,42) * A Note About Sizes: For a better fit, when you ordering SweetMommy"s wear, we recommend that you select one size larger than usual.