Unverified75% confidenceDecision RuleTime unknown
UPF防晒性能会随面料被拉伸（如包裹身体绷紧处）而下降，故防晒皮肤衣不宜选过紧尺码，宽松版型防晒更可靠
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75%
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Long-term
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UnverifiedUPF50+防晒效果依赖面料完整覆盖，选购时需确认版型不过于修身导致面料拉伸变薄，拉伸后UPF值会有所下降88% similarUnverified防晒头套的UPF会随洗涤和拉伸衰减，含物理防晒（二氧化钛处理）的耐久性优于化学涂层款，涂层款洗涤20-30次后防晒明显下降需更换87% similarUnverified防晒面料的UPF会随洗涤和拉伸下降，含二氧化钛等物理防晒整理的产品比纯化学涂层耐洗，反复拉伸的运动款优选原纱防晒工艺87% similarUnverified防晒袖套的UPF防护会随反复洗涤和拉伸下降，尤其依赖织物密度而非涂层的产品；建议一个夏季强度使用后更换，涂层型褪色发白后防晒力显著衰减不宜再依赖87% similarUnverifiedUPF50+为标注防晒指数上限，但实际防晒效果受面料拉伸程度影响——袖套过紧撑开后织物孔隙增大，防晒效果会低于标注值87% similar
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