Slip-On Sideshields are designed to fit all types of eyewear, making them ideal for visitors and temporary workers. They provide a quick and inexpensive way to ensure lateral eye protection. Flex Sideshields are molded to a flexible softness and designed to absorb the energy of impact. No parts or tools required for installation; simply weave through temple. Blocks 100% UV radiation. Meets ANSI Z87.1-2003 High Impact.