I have a ton of other nursing bras from different brands but the only one I can wear the whole day without feeling like I'm dying from heat or itch is the ones from bralette club. Somehow the material is stretchy yet coolling. I have no issues wearing this to sleep. It is easy to nurse, comfortable, classy and makes me feel good. The old nursing bras are cotton and a lot of fabric, it makes me feel very uncomfortable and hot. All nursing bras should be like this one! Comfortable and looks good.