Unverified87% confidenceTradeoffTime unknown
轻量化与背负舒适度是核心矛盾：超轻量包多为无背板或薄泡棉的单气室卷口设计，装载不当会硌背；追求舒适透气需接受钢丝框架或悬浮网背带来的100-300g增重
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87%
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