Caveat emptor. 100% of my luggage is water resistant. Knowing I travel to/frow/thru places where there is rain, my purchases of luggage reflect such possibilities. Almost all hard sided bags can withstand rain, most nylon bags can. Very few bags can't. Even the bags (40 lb sacks stuffed to become hard and round) that come from Africa for immigrants are wrapped in plastic. Even my softsided 22' Tumi rollaboard is made of water resistant material. Many airports even have plastic wrapping machines in the checkin areas. It isn't like the plastic is going to protect the contents from impact damage, but it protects the contents from common naturaly occuring atmospheric conditions.