Superseded90% confidenceDecision RuleTime unknown
户外涉水/皮划艇场景需选IPX7以上防水袋（TPU焊接工艺+卷口三折扣），而非普通PVC缝合袋，后者接缝处易渗水
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This knowledge claim has been superseded by newer content
水上活动（漂流/皮划艇）不建议买普通防泼水户外背包，即使有雨罩也无法防浸泡，应选专用TPU/PVC焊接防水桶包（dry bag）Sources
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