Just used these for the first time with water proof bottoms but heavy rain, so I know the waters not come in down the top.
My daughter found them really comfortatable until her feet were wet through. Bit of a disapointment as had to come home early without reaching the pub for lunch. Hope its just a problem with this pair as perfect apart from this important point. Can't really rate them like this as not fit for purpose. If they were waterproof would give them 4 stars