BOOST undies feature a removable absorbency Booster and can accommodate moderate to heavy menstrual flow, absorbing up to 8 tampons' worth when used with the Booster (and up to 4 without). BOOST undies are made from a super soft Tencel / organic cotton / spandex blend.

BASE undies feature a sleek all-in-one gusset that you can just slip on and go. They’re built to hold light to moderate menstrual flow, absorbing up to 4 tampons' worth. BASE undies are made from a breathable and quick-drying recycled polyester / organic cotton / spandex pinhole mesh fabric.