Unverified90% confidenceDecision RuleTime unknown
床笠式（6面全包/五面包围+床笠边）比平铺式防护更彻底，选购时侧边深度需≥床垫厚度+5cm，例如20cm床垫应选侧深25-30cm款以防翻身脱落
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Unverified床笠式（六面/全包围+松紧）防水罩比平铺垫更防移位，选购时床垫厚度需匹配罩体的裆深（mattress depth），常见裆深25-30cm，加厚乳胶/弹簧床垫需选35cm以上裆深否则套不住93% similarUnverified床垫保护垫的固定方式优先选四角带松紧筒（fitted style围裙式包边≥25cm），只有四角松紧带的款式在翻身时易移位滑脱，尤其床垫厚度＞25cm时必须选包边深度≥30cm的深口款92% similarUnverified床笠床垫适配深度是核心：包边（松紧带覆盖高度）需比床垫实际厚度多3-5cm才能包裹牢固，如床垫厚25cm应选深度28-30cm的床笠90% similarUnverified床笠款需匹配床垫厚度（含加高垫）：普通床垫选25cm深度，厚垫/乳胶叠加需选30-35cm加深款并带全环松紧带，否则包不住或滑动；平铺床单则需比床垫大出30-40cm以便压边90% similarUnverified固定方式优先选四角+六角松紧带一体裹边式（fitted style，像床笠），单纯四角绑带式睡觉翻身极易移位跑偏；床垫厚度＞25cm需确认保护垫裙边深度≥30cm否则套不住90% similar
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