The MILWAUKEE® 4XL/5XL AR/FR CAT. 1 Class 3 High Visibility Safety Vest is engineered to carry more with lightweight protection. The Arc-Rated and Flame-Resistant Vest has ten pockets, including pen pockets, chest pocket with closure, and internal pocket for easy access to essential items while on the job. AR/FR lightweight WESTEX® DH by Miliken® DH material provides added comfort when wearing the vest as part of a complete AR/FR garment system and rated to an ATPV of 5.7 cal./cm². The yellow safety vest features a quick internal size adjustment for better fit and a durable pass-through slit for fall protection gear. The vests are compliant with NFPA 2112 for protection against flash fires and arc flash hazards. Class 3 high visibility vests are recommended for working in environments requiring additional visibility, traffic traveling over 50 MPH, and/or around heavy machinery. AR/FR CAT. 1 Class 3 Safety Vests are ANSI compliant and can be customized by adding a logo.