La Leche League Response: Sleep bras offer very little support. Their main function is for comfort-ability. Sounds like you would need something more constructed - possibly with an underwire or a thick band for support.
Cheryl from Boston, MA. United States
La Leche League Response:
This bra does tend to run on the smaller side just a tad, however if you are a true 34B you should definitely be in a Medium. 34B's can usually even wear a small, although the medium is preferred.
Lindsey from Atlanta GA USA
La Leche League Response: This is the perfect sleep or anytime you need light support bra. A larger busted woman should not expect tremendous support from this.
Kristin from Concord, NH, USA