NFPA 2112 - UL CERTIFIED, 70E Arc protection CAT 4, ATPV 28 55% Modacrylic / 45% Cotton S3 cord management system for increased safety on the job site Smart Safe Secure Lower hand warmer pocket with wire management and hidden cell phone pocket with hook and loop closure Heavyweight rib knit cuffs and waistband with spandex for flexibility, comfort and shape retention