Unverified80% confidenceDecision RuleTime unknown

选购肩部或胸前带纽扣/拉链可调节长度的睡袋，能通过调节实现跨2-3个尺码使用，一件用12-18个月；固定尺码睡袋通常仅覆盖3-6个月身高段，需频繁更换

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