Outer shell: 4.5 oz FR 93% Nomex® Aramid, 5% Kevlar® Aramid, 2% other fiber. Insulation: 10.0 oz FR quilted Nomex®. Hook and loop chin strap. Secures in place, button holes for four-point suspension. Home and light soil wash. One size fits all.-Arc rating: E BT 44.1 calories/cm 2 .-Hazard Risk Category (HRC): 4.Face mask also available. #HNM2NV.Includes face mask.