Depending on your flow Yoni Period Proof Underwear can replace tampons, pads, liners and cups or be worn with tampons and cups for extra protection. Our current underwear absorbs 30ml of liquid, which is approximately as much as three normal tampons’ or pads’ worth of fluid. Be aware that the absorbency layer from the underwear needs one or two days to dry after washing. Therefore, you need more than one pair to cover all your mentruatial flow.