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Taped seams and waterproof testing The membrane is sewn together to follow the shape of the boots. The seams are taped to be waterproof. The waterproof membrane is tested by static 3H method; the outsole sidewall is placed quietly in 10mm water for 3 hours, to assure there is no water infiltration. We recommend applying a waterproof protection. Make sure to choose a waterproof spray for synthetic materials and follow the instruction to apply correct.
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