Bamboo rayon95%, Polyurethane5% * Size Information(cm): S(Length50, Length without strap34,Bust68-82, Belly76-90, Hem38), M(52,36,72-86,80-94,40), L(54,38,76-90,84,98,42), LL(56,40,80-94,88-102,44) * Lift up on the finished opening at the rib cage and push aside the underlayer for disceet nursing. * A Note About Sizes: For a better fit, when you ordering SweetMommy"s wear, we recommend that you select one size larger than usual.