Medela PersonalFit Flex Breast Shield (pack of 2)Description With the PersonalFit Flex breast shield, one of the best new products according to Good Housekeeping*, you can easily adapt the way your breast shield fits to help you find the most comfortable, most efficient position to pump even as your breast shape changes. Its a whole new pumping experience, personalized for mom. Its available in 4 different sizes; choose the right size for maximum comfort and pumping efficiency. The rim of the breast