We know that when we submerge in the water, our uterus continues to give off menstruation, but the blood does not come out completely either.
The pressure of the water counteracts gravity and prevents blood from coming out of the vagina.
But make no mistake, the blood doesn't stop! ;))
So the Period is especially perfect when coming out of the water, and of course, they will also protect you from stains in and out of the water.