Leak-proof absorbency: 0.5 regular tampons = 0.25 regular pad= 1 pantyliner = 1 teaspoon= 5 mL This underwear features our unique leak-free technology in an extended crotch area with a light absorbency - allowing confident coverage in front and behind. The machine-washable panty has a minimum coverage fit with a mid-rise. The soft organic cotton and stretchy lace waistband makes these undies ultra comfortable and you might not even notice the built-in absorbent liner. PLEASE NOTE: the black version has an organic cotton outer layer while the other colors available have a nylon outer layer for extra leak-proof protection.