PumpinPal Super Shields Eliminates constriction of milk ducts caused by traditional flanges. Promotes better flow and reduces irritation to the nipple area. Helps users to sit back in a more comfortable, natural position while pumping. Considerably more comfortable than traditional flanges. Can be used with hands-free systems for the ultimate in relaxed and productive pumping. Especially effective for new moms and C-section moms. Aids in the prevention of mastitis and other breast infections caused by plugged ducts. Pumpin’ Pal shields work with Medela, Lansinoh, and Hygeia. Also fits Spectra with our Spectra adapter Bisphenol A (BPA) Free, made in USA. Medium, Large and XLarge are made with Medical Grade Polypropylene. Small and X-Small made with BPA Free Silicone Dishwasher Safe.