If the label says "UV absorption up to 400 nm" or "Meets ANSI UV Requirements" these are effective.

如果标签上表明“紫外线吸收波长至400nm”或者“达到ANSI紫外线标准”，那么就是有效的。

youdao

If the label says "UV absorption up to 400 nm" or "Meets ANSI UV Requirements" these are effective.

如果标签上表明“紫外线吸收波长至400nm”或者“达到ANSI紫外线标准”，那么就是有效的。

youdao