Medela Personal Fit Flex 24 mmMedela Personal Fit Flex Creates a new pumping experience with a softer feel and better support for all breast shapes. Helps increase milk output by over 11. 8% with greater comfort, thanks to the new Flex design featuring a 105 angled breast shield. Provides excellent support for all breast shapes, including mothers who have undergone breast augmentation (compared to standard 90 angled breast shields).