If there was a queen of breast pump flanges it would be Dee Kassing. I'm serious. Dee knows A LOT about breast pumps and their flanges. What is a breast pump flange? The flange is the clear plastic funnel-like piece that a mother places on her breasts to draw in the nipple and some of the areola in order to extract and collect milk. But why does using the right flange matter very much? Dee explains that using the right flange for you results in the most comfort and milk output. If you are regularly using a breast pump to provide milk for your baby, this podcast episode is a must!