This machine-washable bra is made of 93-percent soft cotton and 7-percent spandex for lasting comfort. Additionally、 the seams have been designed specifically so that they do not irritate sensitive skin areas.Adjustable to a Nursing Woman's Changing ShapeDesigned with a nursing woman's body in mind、 the bra's back panel can adjust its width by up to 10 inches、 while the optional front zipper panel provides two inches of additional maneuverability between the breasts. This combination will allow mothers to customize the bra to their changing body and breast size guaranteeing a perfect fit from their 1st pumping session to their 1、000th!Product Description:93% cotton、 7% spandex、 exclusive of trims.Material_composition : CottonBust: 57、 -80cm