One of my favorite pumping related purchases!  The tank is a very snug fit, which I was a little worried about at first.  As it turns out I wear this under a shirt for work or just running around and it works as a shaper as well as a hands free pumping tank.  If you want to wear it alone, buy a bigger size than you think you need.  I pump more milk when wearing this because of the snug fit.  If you are EPing this is a MUST HAVE!