Medela, in collaboration with researchers and nursing mothers, has developed the breast shield PersonalFit Flex™ - for comfortable pumping that is designed for you. The breast shield has a soft edge, opening angle and oval shape (which can be rotated 360°), for more comfortable pumping and optimized milk production. The shape of your breasts is unique and can change during the breastfeeding period. With this breast shield, you can easily adjust the fit of the breast pump so that it becomes easier to find the most comfortable and efficient pumping position.