Master-piece has come out with their MASTERTEX-04 collection utilizing a special breathable waterproof fabric. If you’re always hiking in a raining season (don’t know why you would do that), this would be the backpack to use as it is very versatile, and well handle very will in rain weather (see video below, it isn’t rain weather but you get the idea). However, only get it if you have the money, this will run you about $470 USD… if you’re interested, you can get it at their online store.