The Occunomix LP690 Classic Flame Resistant Mid-Length Winter Liner is a high quality and well made safety liner which is able to help protect your head from fire, arc flash, and the cold when worn in high risk working environments. This head liner features a high quality outer shell construction that includes 6oz of fire resistant 100% cotton twill. It also comes with an inner liner that is made with 6.5oz of Cotton and Modacrylic material that helps with delivering an insulated ear barrier design. Sewn together using Nomex thread, this flame resistant liner can easily withstand fire for up to 50 washes. Designed with a hood and loop strap system, it can easily be put on and taken off with ease. This liner can also offer hard hat attachment tabs that allows you to secure your hard hat on top of your head with ease. Outer: 6 oz. 100% Flame Resistant Cotton Twill Lining: 6.5oz. Modacrylic/Cotton Jersey Insulated Ear Barrier: DuPont™ Tyvek® Nomex® Thread Warming Pack Pockets Hook & Loop closure & tabs for attachment to hard hat Horizontal reflective strip on back above the neck Meets ASTM F1506 Arc Rating: ATPV = 21 cal/cm2; NFPA 70E / HRC = 2 Flame resistant through 50 washings FR Hard Hat Liner LP690