These are OK for sleeping, but the cups are way too small. I am currently about a 36 D because of breastfeeding. I got a size Medium. The band is a comfortable size, a little loose, but that's too be expected in a sleep bra. The cups barely cover my nipples and breasts come out too easily. They need at least an inch more fabric. The fabric is ok, not as soft as I was expecting, and stretched out a lot while wearing, with no bounce back. Also, the arm holes are cut odd... The straps rub and dig a little into the armpit area. Would not but these again.