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The purpose is simple waterproofing and seam reinforcement
[Inside]One partition is attached to the inner stomach side
This treatment not only provides water resistance but is primarily designed to prevent seam slippage—where stitch holes expand under tension—significantly enhancing the product's overall durability
making it both easy to use and safe
Isak ZipperPouch Dyneema®︎ ZS-1037 The purpose is simple waterproofingType Zipper Pouch Main fabric 1. 0oz Dyneema Composite Fabric Size W 195mm H 130mm D 55mm bottom width 175mm Weight 9g The zipper uses YKK Aquaguard. The gusset part is unsewn and treated with strong tape to increase waterproofness. Although it is not completely waterproof, it does have the ability to shut out a certain amount of moisture. This pouch is very convenient for storing small items. Regarding waterproof performance, we do not use seam tape
