@Infoseepage i didn't consider rain on the pancake filters, because I live on a semi arid island that has months where it doesn't' rain, and can usually avoid going out on the days it does rain. I had a mutual on another social media platform from Seattle, who was also concerned about rain resistant filter housings, so that makes sense.
By the way, you might find it useful to know that, unlike NIOSH certified filters (which are bright pink) the European CE rated versins of filters are white (FFP3 is closer to n99 than p100 if that matters, though)