This bra is so comfortable, it doesn't bind up even when  sleeping. I can't tell you how many bras I've tried to sleep in, and all were so uncomfortable. This one has snug enough elastic that I stay put, but don't feel uncomfortable all night long. The lining does come up a bit high, so most v-neck shirts are troublesome, but anything else works fine. I bought the XL so the front and the elastic on the largest hook is a bit too loose, but my normal size is only a 40C, so I should have gone with the large, but I was just so tired of every sleeping bra feeling like a vice. I say, get the right size and you should be happy.