Stay Warm - PREMIUM - Shoulder Length Two-Way Warmer w/Ear Warming Pockets-LZ620-EACH Upper Shell: 6 oz. 100% Flame Resistant Cotton Twill Arc Rating: ATPV = 21 cal/cm2, NFPA 70E / HRC = 2. Upper Lining: 6.5 oz. Modacrylic/Cotton Jersey. Lower: 18 oz. Modacrylic/Cotton/Spandex Soft Rib Knit Arc Rating: ATPV = 28.6 cal/cm2, NFPA 70E / HRC = 3. Nomex Thread and zipper. Warming Pack Pockets. Zipper on/off bottom. Insulated Ear Barrier: DuPont Tyvek. Button closure. Hook & Loop tabs or button holes for attachment to hard hat. Meets ASTM F1506. Flame resistant through 50 washes