Unverified80% confidenceFactTime unknown
浅色速干T恤的防晒指数通常低于深色同款，白色UPF往往只有15-20，户外防晒优先选深色或标注UPF50+的浅色（需额外添加抗紫外整理剂）
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80%
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Long-term
Relevance
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Unverified选防晒功能优先看标注UPF50+（可阻隔97.5%以上紫外线），仅标注'防晒'无UPF数值的多为营销话术；浅色速干T恤防晒能力通常不如深色同款90% similarUnverified防晒速干T恤要认准UPF≥40且标注UVA透过率＜5%才算有效防晒；深色、密织面料防晒优于浅色薄款，单纯浅色速干衣防晒能力有限89% similarUnverified防晒需求选UPF≥40且标注UPF50+的款式，普通深色涤纶T恤实测UPF约15-30远不达防晒标准，浅色透光更差89% similarUnverified防晒速干T恤的UPF值需≥40才有实际意义（UPF40+可阻挡97.5%紫外线，UPF50+阻挡98%以上），深色面料防晒优于浅色，但深色吸热更闷需搭配透气网眼设计88% similar
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