Yes, Eyouagro insect netting and insect barrier fabric can block UV rays. Insects are more attracted to UV light than humans. This means that insect netting should stop them from entering your home, even if it doesn't block out the sun's rays. It features UV protection to block the sun's rays from propagating through the netting or fabric. The mesh will not allow UV light in a while, keeping insects out. This means that plants can grow underneath without being harmed by hungry pests like caterpillars, moths, and beetles.