This maternity rash guard swim shirt features curvy, contoured color blocking that creates an hourglass illusion. The result is a comfortable swim top that is extremely flattering to the pregnant form. The fast drying, stretchy fabric is SPF 50+ and contains Xtra Life Lycra® for chlorine resistance. The drawstring bottom allows you to adjust the fit and also ensures that your top won't float up in the water. This swim shirt does not have built in bust support. It is designed to be worn over a bikini top, sports bra, or regular bra ? a great solution for women who prefer the fit and support of their own bra or bikini top.