A fire retardant coverall is a specialized protective garment designed to provide effective flame resistance and protection against heat and fire-related hazards. These coveralls are constructed using fire-resistant materials that have been treated or engineered to resist ignition and limit the spread of flames. 

They are commonly worn by workers in industries such as firefighting, oil and gas, welding, electrical utilities, and chemical processing, where exposure to fire and heat is a significant risk. Fire retardant coveralls are typically made from flame-resistant fabrics like aramid fibers (e.g., Nomex®), modacrylic, or treated cotton. These materials have inherent flame-resistant properties or are treated with chemicals to enhance their resistance to ignition and the propagation of flames. The coveralls are designed to provide full-body coverage, featuring long sleeves, full-length pants, and a front closure (e.g., zipper or snap buttons) for easy wearing and removal. They may also include additional safety features such as high-visibility strips, reinforced knees, multiple pockets, and adjustable cuffs for added convenience and protection. Fire retardant coveralls are crucial in protecting workers from burns and thermal injuries, helping to minimize the risks associated with fire incidents and ensuring their safety in high-heat environments.