FR-Tech® 88% premium cotton blended with 12% high-tenacity nylon, 10 oz. (340 GSM) Modacrylic Viscose blend insulation Material and all components meet CGSB 155.20-2017 and NFPA 2112-2018 certified to UL Sewn with inherently FR thread All metal components are concealed to ensure no arc flash conductivity CSA Z96-22 Class 1 Level 2 and Class 1 Level FR 6.5 oz. (220 GSM) modacrylic polyester FR insulation StarTech® FR reflective tape Tough double-stitched seams Radiophone clip strap FR brass non-locking zipper Fleece hand warmers Underarm gussets for extra mobility 6 storage pockets: 2 back, 2 chest, 2 side Action back, elastic waist and aramid storm cuffs Arc Flash PPE Category Level 4 Arc Rating 58 cal/cm² Colour High Visibility Orange Standard(s) Met ASTM F1506