Nursing bras with underwires usually provide great support. Some women find underwires uncomfortable, and you should not sleep in a bra that has an underwire. Also, when wearing an underwire bra, be sure the wire is not putting pressure on the breasts, as this could lead to block ducts and mastitis. If you do not currently wear an underwire bra, you may want to go with a nursing bra that also has no underwire. A nursing bra with no underwire may not provide enough support for large-breasted women.
Flaps make nursing easy and convenient, and can be especially handy when nursing in public.
Sometimes the flaps connect at the top of the bra cup, and other times they connect at the middle of the two cups, near the band of the bra. You should go with whatever type is easiest for you to clasp and unclasp with one hand. Example of a nursing bra with a flap that connects at the top of the bra. A good nursing bra does not restrict the baby's access to the breast. Example of a nursing bra with a flap that connects at the middle of the two cups.