Sports Bras-These are typically very comfortable, and while they may not flatter your figure as much as an underwire bra, they are great for wearing around the house, to sleep in, and for exercising.
Soft Cup-If you don't like the feeling of an underwire bra, then you'll probably want to purchase a couple of soft cup bras, instead.
Be sure you look for one that gives lots of support without the underwire, however.
Underwire-If you typically wear underwire bras, and you like the way they look, you don't have to stop wearing them just because your nursing.
However, if your milk supply seems diminished, be sure your underwire bra is not too constricting.