Unverified85% confidenceTradeoffTime unknown
记忆棉支撑好但重（约300-400g）且不可压缩，充气款轻便可压缩但需吹气且贴合度差——空间与支撑不可兼得，看重收纳选充气，看重睡眠选记忆棉
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85%
Confidence
Long-term
Relevance
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Unverified记忆棉密度需≥50D才有足够回弹支撑，低于45D长期使用会塌陷变形；凝胶记忆棉散热优于普通记忆棉但重量大、偏硬81% similarUnverified记忆棉密度建议50D以上，密度过低（＜40D）回弹快、支撑塌陷，睡熟后头部下沉起不到托举作用79% similarUnverified记忆棉密度50-60kg/m³支撑与回弹平衡最佳；密度＜40过软塌陷不支撑，＞70偏硬且低温变硬78% similarUnverified记忆棉密度决定支撑与寿命：40D以下偏软易塌陷，50-60D支撑适中，密度越高越贴合但越闷热；颈椎枕建议选50D以上并带开孔透气结构77% similarUnverified记忆棉支撑垫的密度应≥50D，低密度记忆棉（＜45D）在体温加持下30分钟内会明显塌陷失去支撑，只剩缓冲无支撑77% similar
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