Occasionally breast pain is due to inadequate drainage, blocked ducts, mastitis and ultimately abscesses. This is when a supportive, well-fitting nursing bra that is not underwired is essential. Cantaloop Nursing Bras are soft with no seams or wires to rub and fit perfectly. They also allow for the considerable size changes that occur throughout the day and especially at night when breasts are full. A Cantaloop Nursing Bra is comfortable enough to sleep in.