Unverified85% confidenceTradeoffTime unknown
全悬空网背（trampoline mesh）透气性最好但会使重心远离背部、增加杠杆力矩，负重超过18kg时后拉感明显；沟槽式贴背泡棉牺牲部分透气换来更稳定的重心，适合重装
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85%
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