What is a cut and sew bra? “Cut and Sewn” bras have 2 or more fabric pieces, sewn together with seams. By far, cut and sewn bras are the most supportive and shaping bra style you can have. The seams help shape and provide contour to your breasts. Another advantage of a cut and sewn bra is that it gives your breasts a beautiful shape and centers your breast tissue.