Unverified80% confidenceDecision RuleTime unknown

抗UV看UPF值而非'防晒'字样，UPF50+才有实质防晒意义；黑胶或银胶涂层徒步伞可兼顾遮阳，但会增加重量约30-50g

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Unverified防晒伞看UPF值和涂层，UPF>50+且黑胶/钛银涂层才是真防晒，普通银胶或纯色涂层UPF常低于30，遮阳效果打折88% similar Unverified防晒能力看UPF值和涂层：UPF50+代表阻挡98%以上紫外线，是防晒伞及格线；黑胶涂层防晒最强但吸热闷，钛银胶更均衡，普通银胶次之。伞面颜色深浅对UV阻隔影响很小，涂层才是关键。86% similar Unverified天幕遮阳性能看抗UV指数UPF值，UPF50+可阻挡98%紫外线；银胶涂层比普通涂层降温更明显但会增加重量并可能随使用脱落85% similar

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