Why is the raincover needed when fabric of the bag is waterproof already?
The fabric of our motorcycle bags itself is waterproof because we have plastic sheet laminated on the back side of the fabric. During the bag assembly, it needs to have many stitching on the fabric to conceal the fabric into a bag. The reason to enclose the rain cover is to prevent the water going into bag through the needle hole on the fabric. For the short time exposed in the rain, it should not have problem at all without rain cover. But for long ride in the rain, it’s better to have rain cover on the bag to ensure the water is not coming through the needle hole. The rain cover has the plastic film taping on top of the stitching hole, so there is no possibility for water penetration.
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