The waxed cotton that Gustin (and many other fashion brands) use isn't really meant to be a durable outdoor fabric. It's tough and can take a beating, but the waxing is more aesthetic than anything. They will repel water somewhat in the beginning but the wax wears off faster than something like Barbour, Filson, etc. I imagine re-waxing the jacket would make it more waterproof.
4/7/15 at 6:03am