Unverified85% confidenceDecision RuleTime unknown
软壳干袋满载后需保留至少1/3空气才有可靠浮力,若追求落水漂浮救生功能应选20L以上并只装轻物,装满重物的干袋不能当浮具
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Unverified容量选择留20%空气缓冲:卷口袋需保留气室才能漂浮,装满物品到顶会无法折叠密封且失去浮力,20L袋实际装载建议不超过16L84% similarUnverified悬挂式和大容量洗漱包展开后体积大,防水面料越厚、分格越多则空包自重越大(可达400-600g),会挤占行李配额;仅带随身背包出行应选150g以下轻量款80% similarUnverified容量与折叠便携存在权衡:3L水袋满水后重量达3kg会拉扯背包重心且晃动,除多日无水源纵穿外,多数徒步2L更平衡;空袋折叠体积三者差异不大79% similarUnverified漂流/皮划艇选20-30L干袋(Dry Bag)足够,30L约装2-3人一天补给;海钓浮潜带随身贵重物选2-5L小挎包;徒步防雨内衬袋按背包容量的60%配置78% similarUnverified20L容量大致可装入一套完整换洗衣物加睡袋或中型物品,作为皮划艇舱内分装袋或背包内部防水内胆均为常见用法78% similar
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