
Originally Posted by
Tom Bihn
The zippers on the Aeronaut are YKK's "splash-proof" Aquaguard zippers and are indeed exposed. We could have made flaps to cover the Aeronaut's zippers but the extreme curve of the main opening especially would make the flaps far more trouble than they are worth: the flaps would get in the way every time you zipped or unzipped the bag. We chose instead to use the splash-proof zippers. And though carrying a plastic bag as a rain cover for extra protection isn't a bad idea, my experience with the Aeronaut would incline me to believe the bag passes Imago Metrics' 10 minute shower test no problem.
The Brain Bag, on the other hand, has no exposed zippers, as they all have fabric flaps covering them. Whether zippers with flaps or zippers with a urethane coating (like YKK's Aquaguard) provide the best long-term weather-proofness remains to be seen.