Quote:
Originally Posted by Ralgha
Never trust a spray if you need things to stay dry. Gore-Tex for clothing (assuming you want the breathability), plastic or rubber for anything else (including backpacks). If you do go with a spray on the bag, I'd put important things inside plastic ziplocks inside it.
Thin plastic bags often have small holes in them too, so double bag if it's really important.
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Agreed... But some of the new blends of sprays do work very well. However, zippers and other non fabric areas (expandable fabrics) can never be made waterproof. It's a backpack, expect things to get wet no matter what you do. There is no magic wand here.