Flame-resistant and arc flash clothing helps protect workers against burn injuries in areas with sparks, open flame, and other potential fire hazards. Also called FR clothing, this protective clothing resists ignition and helps insulate against heat. It includes flame-resistant garments made of materials that naturally resist burning or melting and flame-retardant garments that are chemically treated to self-extinguish. Arc flash protection garments are a specialized FR clothing typically worn when working with or near electrical equipment where electric arcs may heat surrounding air to extreme levels that can set standard clothing on fire. Aluminized clothing reflects radiant heat to help maintain a safe body temperature.