Black has the best anti-ultraviolet effect, but as a dress, if you wear it in summer, you should also consider the visual "heat". I personally don't recommend it. If it is a sunglasses lens, perhaps the darker the effect, the better. Or sun hats, some are super eaves, translucent plastic sheets, and black casts the coolest light and shadow, so there will be no uncomfortable feeling on visual objects. But as clothes, the first sentence that comes out of blackheads is stuffy, stuffy, airtight, heavy, endothermic and boring, like dark clouds, like umbrella cloth, old-fashioned, in a bad mood and burnt. So although the ultraviolet shielding effect is good, I don't want to wear it or watch others wear it. Also, because sun protection clothes are usually long-sleeved and high-necked, and a large area of black coverage should not be considered as hiding. In fact, there is a strong sense of existence and there is no way.