How to choose sunscreen mask customization

How to choose one of the customized sunscreen masks, thick. Thick cotton masks can block 100 times of ultraviolet rays, while thin chiffon masks have much less ability to block ultraviolet rays; sunscreen masks are customized for the second, the density of the fabric. Although the swimming cap and the riding cap are thicker, the fabric of the swimming cap is more elastic, and the gap between the lines is large, so the ability to block ultraviolet rays is poor. However, when the swimming mask encounters water, the water will form a protective film on the surface of the mask to enhance the reflection of ultraviolet rays and increase the SPF. The third part of sunscreen mask customization is color. Black fabric absorbs UV rays, white fabrics reflect some UV rays, and it's easy to see why such thin chiffon still blocks 66% of UV rays.