Unfortunately, rather flat lenses fit in there, 50mm or pancakes. One part is made of neonprene, drizzle was no problem, but really rain... I couldn't say now, unfortunately.
Somehow (!) the camera fits into the bag. Unfortunately, the case for the lens filters ordered at the same time from Digitec on the advice of customer service does not; but given the cost of the case vs. the cost of returning it, I'm going about business as usual.