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材质硬度越高越能承重堆叠但自重也越大，40L以上PP硬箱空箱就有2-3kg，纯衣物收纳选半透明PE软硬箱更轻便省力

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Unverified收纳体积与材质耐久是反比关系：轻量化薄面料收纳小便携但抗撕裂差，加厚牛津布耐用但收纳包普遍占后备箱1/3空间且重量超8kg86% similar Unverified硬框（含内置支撑板或塑料骨架）打包块保形性好、堆叠不塌陷，但自重比软袋重约150-300g且不可压缩，登机箱7kg限重下应优先选软质压缩袋84% similar Unverified存放羽绒服/棉被等蓬松衣物选60L以上大容量+软性布艺箱，PP硬壳箱内部空间利用率低约15%（受箱壁弧度和加强筋影响），同标称容积布箱实装更多83% similar Unverified长期底层堆叠存放的收纳箱必须选硬壳PP材质且承重标注≥15kg，布艺箱堆叠2层以上会塌陷压皱衣物83% similar Unverified单箱容积并非越大越好：容积超过50L装满后重量常超20kg，搬动困难且底层承压易变形，建议衣物类30-40L、杂物类20-30L更实用83% similar

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