Unverified80% confidenceDecision RuleTime unknown
背负舒适度关键看肩带宽度和背部透气：肩带宽≥5cm并带加厚海绵、背部有网眼透气层，长时间背负不勒肩；带胸前扣或腰部固定带的款式可分散重量，适合徒步或长时间外出
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