Red tent and blue tent. Which is against the sun?
At present, domestic and international standards for textile anti UV properties generally use the UPF value, that is, UV protection system to assess the value. The UPF value is the ratio of ultraviolet radiation to the average amount of radiation of unprotected skin, and the greater the UPF, the better the UV protection. This index will be marked on regular manufacturers' products. I hope my answer can help you,
General tent also comes with sunscreen function, but must pay attention to choose the brand. Regular brands of umbrellas, in accordance with national requirements, each umbrella marked with the corresponding spf.
1gear equipment network is pleased to answer for you, the longest red light wave, can absorb large amounts of ultraviolet light in the sun, and other colors are relatively weak, so the summer red tents can prevent ultraviolet rays, prevent sunburn.
