Made with Norse’s 10.7 oz. Polartec® Wind Pro® FR this vest is engineered with a compact knit for up to 4x greater wind resistance than regular synthetic fleece. The vest’s outer layer features Polartec® Wind Pro® material for added warmth and durability while its side panels are made of Polartec® PowerGrid FR material for flexibility, to move with you as you work. Perfect for layering in chilly or changing temperatures, this vest provides 9.4 cal (CAT 2) arc flash protection, is NFPA 2112 certified, and meets the performance requirements of ASTM F1506.