Unverified80% confidenceTradeoffTime unknown
防水性看涂层而非面料：PU涂层防泼水但久压易开裂脱层，硅涂层（sil-nylon）防水更持久且更轻，但硅涂层背包无法用胶带压胶做全防水接缝
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80%
Confidence
Long-term
Relevance
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