Unverified85% confidenceTradeoffTime unknown
自重越轻越省力但通常牺牲背负支撑和面料耐磨：超轻包(＜1kg)背板简化、腰带薄，只适合负重10kg以内；重装长线宁可多背500g换取更好的承重转移
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85%
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