I just got a new bag that i'm planning on using as my go everywhere pack I'm pretty sure it's water repellant, but i was lookin to fully waterproof it and I was wondering what kinda stuff you guys would reccomend for waterproofing this and other materials. I've seen some sprays and i've also seen some that is Wash-in. I Didn't know if there was any difference between how well the different application methods are I would assume wash-in would give you better coverage, or if there are specific products that you guys would reccomend from past experiances. Thanks in advance.