Neese Dura Arc II Class 3 Jacket with Attached Hood (ASTM F1891). The Neese Dura Arc II Series is made of PVC on woven modacrylic, and engineered from the proven materials especially for utility workers exposed to electrical arc hazard and flash fire. The Dura Arc II Class 3 Bib Trouser has a Wide Leg Design and Reflective Tape.