🌸Designed specifically for your Medela breast pump: Works with Sonata, Freestyle, Pump In Style Advanced Starter Set, Swing and Harmony -Water resistant, microfiber material: Easy to clean/Top zipper closure: For privacy and security -Adjustable strap: Comfortable to wear/Large top opening and low-bag profile: Easy to store and see everything -Power adaptor access port: Discreetly charge your breast pump between pumping sessions -Multiple exterior and interior pockets: Provide maximum organization -EUC /no signs of wear