....not very supportive. I'm a small size, and even for me, this bra does not support well. It is extremely comfortable, the only problem being that it does not wick very well. It's mostly nylon and it traps moisture. Still, as long as I'm not actually running, it is supportive enough for my small chest, it's easy on and off, and it's so comfortable that I have slept in it. I bought several of these bras at Bare Necessities, which was a little more expensive but worth it, as they had so many pretty colors available. I wash the bras in the washing machine on cold, in a lingerie bag, and hang them to dry and they have held up very well. They do give you a very nice silhouette, especially under tighter tops, but I do recommend measuring yourself and getting the correct size. I would say if you like the feel of being braless, this is a good item to have. It has enough support and coverage to go with everyday clothes, and it's comfortable enough to wear all day and into the night. I'll be buying more.