Our Evenly Bra Balancers can be worn in any bra you already own, as your smaller breast will sit within the deep concave back of the breast form which will keep it snugly in place. However, like any other silicone breast form, you can place it inside the pocket of a bra (or bikini top) if you'd like a little extra security that it won't slip out - it’s entirely your choice as to what you’re comfortable with. For other silicone breast forms, such as a full breast prosthesis you may need to wear a pocketed bra (sometimes called a mastectomy bra).