Unverified88% confidenceDecision RuleTime unknown

同等保暖需求下，蓬松度是关键指标：800FP（蓬松度）羽绒达到与650FP相同保暖效果所需充绒量更少、重量更轻。轻量化徒步选800FP以上，自驾露营对重量不敏感可选650-700FP降低成本

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Unverified蓬松度是衡量羽绒保暖效率的核心指标：800蓬以上为高端，通勤日常600-700蓬即够用，同等重量下蓬松度越高体积越轻84% similar Unverified蓬松度800FP以上的羽绒中层在同等保暖下比700FP轻约20-30%、压缩体积更小，适合负重徒步和登山打包；日常城市叠穿700FP足够83% similar

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