Fire retardant jerkins are sleeveless jackets worn as a protective layer over clothing, designed to provide protection against fire and heat. They are commonly used in industries where workers are exposed to high temperatures and fire hazards, such as welding, oil and gas, and firefighting.

Fire retardant jerkins are made from materials that are inherently resistant to flames, such as wool, cotton, and modacrylic. They are often treated with special flame-retardant chemicals to enhance their protective properties. In addition to providing protection against flames, fire retardant jerkins also offer insulation against heat and cold, and some models may have reflective tape or other high visibility features for added safety.