My Necessity is a luxurious multi-fit seamless bra with removable foam cups and a side sling support. The perfect style for your hospital bag, for sleeping in and around home. This is a soft support style with no seams for the ultimate in comfort, and a flexible fit that will expand 2-3 cup sizes to offer total comfort and flexibility for your changing size throughout your pregnancy and for postpartum changes.nges. My Necessity REGULAR is designed for the smaller bust from an A to an DDD cup. If you are bigger than an E cup, purchase our FULL CUP style.