Extra Long Nomex ® IIIA Arc Rated Winter Liner with Mouth Piece Shell 100% Nomex® III A Insulation: Thermatex ® 94% Aramid, 6% FR Lenzing, Inner Liner: Nomex® IIIA ARC Rating: 48.2 (Level 4) Only Fire Retardent components used throughtout this product. * * Free Shipping by Mail * *