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Water proof spray would only help with the outside of the bag. Waterproofing is available that the bag is washed in which coats all the down with hydrophobic water repellant. Or ready made ones ar...
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Water proof spray would only help with the outside of the bag. Waterproofing is available that the bag is washed in which coats all the down with hydrophobic water repellant. Or ready made ones ar...