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遮光率≥90%的深色网纱能阻挡大部分可见光，配合UPF50+防紫外线标识才能有效防晒；单纯遮光不防紫外线的产品实际护眼效果有限

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Unverified遮光率标注需区分'防紫外线'与'物理遮光'：网纱型遮阳帘UPF≥50+可阻挡99%紫外线，但透光可见光仍强；纳米镀铝/双层遮光布才能实现85%以上物理遮光挡住直射刺眼阳光90% similar Unverified网纱UPF50+主打防紫外线与透气观察，但对强光眩光的物理遮挡不如全遮光布料88% similar UnverifiedUPF50+ 为行业通用最高防护档位标注，表明面料本身防紫外线性能达标；但防晒效果的实际短板在于覆盖盲区（眼周、发际线），而非面料指数不足。87% similar

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