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So if polyester drawstring bag is [url=https://www.wellpromotion.com/products/cooler-bags-wholesale.html]cooler bags wholesale[/url] advertised as "waterproof", don't believe it. The manufacturer may refer to the natural waterproof property of the fabric, or the fact that the fabric becomes "waterproof" after DWR treatment. A real waterproof bag will involve multi-layer, seam sealing [url=https://jp.wellpromotion.com]カスタム バックパック[/url] technology, and it will take a high price to be labeled.
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