Arc-Rated and Flame-Resistant vest has ten pockets, a quick internal size adjustment for better fit and a durable pass-through slit for fall protection gear. AR/FR breathable, anti-static GLENGUARD® Mesh provides added comfort to you when wearing the vest as part of a complete AR/FR garment system and rated to an ATPV of 4.1 cal./cm². Class 3 high visibility vests are recommended for professionals working in environments requiring additional visibility, traffic traveling over 50 MPH, and/or around heavy machinery. ANSI compliant.