With the Medela PersonalFit Flex Connector, you can pump in a more reclined and comfortable position Medela Flex technology is a whole new pumping experiencehese Medela breast pump connectors are designed exclusively for use with Medela s Pump In Style with MaxFlow , Freestyle Flex , and Swing Maxi breast pumps.Use of pump parts or accessories not designed for your specific breast pump may cause irreversible damage to the product