The etched stainless steel mesh visor with its unique hexagon-shaped mesh is designed to provide superior light transmission in low-light conditions. This visor is designed to protect the user from wood chips and other small flying debris. For use with the STIHL Function Basic and Pro Mark„ Helmet Systems.Note: Goggles or protective glasses meeting ANSI Standard Z87.1 must be worn under face screen and shield for primary eye protection.