As a rule of thumb, you should change the breast pads every 3 to 4 hours at feeding time. The rich nutrients in breast milk and the heat of your body make Breast Pads an ideal breeding ground for bacteria. Be fastidious about changing them. Breast Pads are an essential product for mothers who are breastfeeding their babies, because they catch milk that leaks out. Perfectly adjustable to the shape of your breasts, both sides feature gentle gathers and adhesive tape.