Jackets are constructed of a Pyrovatex outer layer backed by a layer of flame-retardant Aramid material then lined with an additional layer of Pyrovatex flame-retardant cotton material which offers a high level of heat and flame protection along with durability and comfort to meet the requirements of the SFI 3.2A/5 rating. Jackets have many features including multi-needle overlock stitching design for exceptional seam strength and a brass Nomex-backed zipper with a double overlap for a secure front opening.