[mars817]

My son is 5 months and a tummy sleeper now too, the thirsities fab fitted is stay dry if you do want to try fitteds. I have found the moisture doesn't bother him though. Also bg 4.0 have about a 1 inch wide piece of pul on the tummy side so that would probably keep them from leaking out the front ( I think that was the purpuse). I have not tried them overnight since he slept on his tummy but he didn't leak in those stuffed with a micofiber insert and a hemp underneath.