Neese Dura Arc Class 3 Bib Trouser (ASTM F1891). Neese Dura Arc is the original entry into Arc protective rainwear arena and remains a great product for protecting workers from Arc hazards. Integrating PVC on Dupont Nomex brings workers Arc flash safety, high visibility, and waterproof protection. The Neese Dura Arc Class 3 Bib Trouser has a wide leg design and is hi-vis and Arc Rated.