Unverified80% confidenceDecision RuleTime unknown
填充物优先选7D/9D中空PP棉或碎海绵：中空棉蓬松回弹好但久压易结块，碎海绵支撑硬挺但偏重且透气差。纯羽绒棉柔软塌陷快，护腰支撑不足不建议作为孕枕主填充
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