This is LITERALLY the best bra I have ever owned! Other women say they wear it to bed. I wear it everywhere. Seriously, EVERYWHERE! It's so light and comfortable, and I have plans to order another 5 or 6 more so I can rotate them through my wash cycle. I am 5'9 and weigh 139-ish, and the medium fit me perfectly. I can already tell that with overuse the elastic is going to start going out, which is totally understandable considering it is crazy thin material. Just another reason I want to order a bunch more though :)