A skin-care product. PersonalFit Flexâ„¢ Breast Shield, adapts easily to the shape of Flex breast pump, helping to find the most comfortable and efficient position for milk extraction. Contains 2 Breast Shield. Adapted for old Swing (030.0054), Swing flex, old Swing Maxi, Swing maxi flex, Freestlyle flex and Harmony (005.2054).