The world of work is fraught with risks, particularly in industries where fire hazards are common. In such hazardous environments, it is crucial to prioritize the safety and well-being of workers. This is where FR (flame-resistant) rated clothing comes into play. 

FR-rated clothing refers to garments that have been specifically designed and manufactured to provide protection against the potential risks associated with flames and heat. These garments are constructed using special fabrics and techniques that make them resistant to ignition, reducing the risk of burns and injuries in various workplace scenarios. 

What is FR-rated clothing?

FR-rated clothing is a specialized type of protective apparel that has properties permitting it to self-extinguish when exposed to flames or excessive heat. It serves as a barrier between the wearer’s skin and potentially dangerous thermal energy, helping prevent burn injuries. Unlike regular clothing, which can ignite easily and continue burning, FR-rated clothing has unique characteristics that minimize ignition and reduce the severity of burns in case of accidental exposure to flames or high temperatures. 

Importance of FR-Rated Clothing in Various Industries

The importance of FR-rated clothing cannot be overstated, especially in industries where workers are exposed to fire hazards on a regular basis. Sectors such as oil and gas, electrical utilities, chemical manufacturing, and many others require employees to wear FR-rated clothing as part of their personal protective equipment (PPE). By wearing FR-rated garments, workers significantly reduce the risk of sustaining severe burns during accidents or exposure incidents involving open flames or high temperatures. 

This article aims to provide an in-depth understanding of FR-rated clothing: its definition, functionality, and materials used in its production process; it will also explore the significance of FR-rated clothing in various industries, highlighting the risks it mitigates and the benefits it offers to workers. By the end of this article, readers will be equipped with a comprehensive understanding of FR-rated clothing and its importance in promoting workplace safety. 

Understanding FR-Rated Clothing

What is FR (Flame Resistant) Rating?

Flame resistance, commonly referred to as FR, is the ability of a material or fabric to resist catching fire and prevent its spread.  In the context of clothing, an FR rating indicates the level of protection it offers against flames and thermal hazards. The rating is determined through rigorous testing methods such as ASTM F1959 (arc flash) and ASTM F1930 (flash fire). These measure the fabric’s ability to self-extinguish when exposed to a flame source. It also measures the ability of a fabric to slow down the transfer of heat through the material.  A higher FR rating indicates better protection against fire incidents. 

Flame resistance refers to a material’s ability to resist ignition and delay combustion when exposed to flames or high temperatures. In clothing, flame-resistant materials are designed to provide an added layer of safety for individuals working in hazardous environments where potential exposure to flames or thermal hazards exists. The purpose of incorporating flame-resistant properties into clothing is to minimize the risk of severe burns by reducing flammability and slowing down the spread of fire in contact with the fabric. By reduction of a workers burn injury translates into an increased chance of survivability.

What is the difference between flame-resistant and flame retardant?

While often used interchangeably, there is a distinction between “flame resistant” and “flame retardant.” The characteristic of being Flame-resistant refers to the ability for the materials to be resistant igniting and sustaining combustion. These fabrics have built-in properties that offer protection from flames, heat, and sparks. On the other hand, flame-retardant  is the chemical treatment that inhibits or delays ignition when exposed to flames. 

Materials used in FR Rated Clothing

FR-rated clothing utilizes various types of materials that possess inherent flame resistance properties or synthetic fabrics treated with additives for enhanced fire retardancy. 

Common fabrics with inherent flame resistance properties include: 

– Aramid fibers (e.g., Nomex, Kevlar): Aramid fibers are highly resistant to flames and heat due to their unique chemical structure. They do not melt or drip when exposed to fire, making them suitable for protective clothing in high-risk industries. 

– Modacrylic fibers: Modacrylic fabrics offer excellent flame resistance properties combined with good dimensional stability and durability. These synthetic fibers are commonly used in protective clothing for workers exposed to heat and flames. 

Synthetic materials with added flame-resistant finishes include: 

– Cotton treated with flame-retardant chemicals: Cotton fabrics can be treated with special chemicals to provide temporary flame retardancy. These finishes work by extinguishing flames upon contact or forming a protective barrier that prevents the spread of fire. 

– Polyester blends with fire-resistant coatings: Polyester fabrics can be blended with other inherently flame-resistant synthetic fibers such as aramid or modacrylic, and then coated or treated with fire-retardant finishes to achieve a higher level of protection against flames. By carefully selecting the appropriate materials, FR-rated clothing manufacturers ensure that workers in high-risk industries have garments that offer reliable protection against the hazards of fires and thermal incidents. 

Industries that Require FR-Rated Clothing

Oil and Gas Industry

In the oil and gas industry, workers face substantial flammable hazards due to the presence of volatile substances such as oil, gas, and chemicals. The potential for fire and explosions is a constant risk in this environment. Consequently, it is crucial for employees to wear flame-resistant (FR) clothing to mitigate the dangers associated with these hazardous materials. 

FR clothing provides a vital layer of protection by reducing the risk of burns from direct contact with flames or exposure to intense heat. Furthermore, regulations and standards have been established in the oil and gas sector to ensure worker safety. NFPA 2112 is the standard for shirts, pants, coveralls and other daily wear items.  ASTM F2733 is the standard for rain gear.

Organizations such as the Occupational Safety and Health Administration (OSHA) have specific guidelines in place that mandate employers to provide FR clothing to workers who are at risk of encountering fire hazards. These regulations outline the requirements for proper garment selection, maintenance, testing procedures, and labeling standards. 

Electrical Industry

The electrical industry poses unique risks related to electrical arc flash hazards. An arc flash occurs when an electric current passes through an air gap or insulation breakdown, resulting in an explosive release of energy manifested as an intense blast or arc explosion. 

This event can cause severe burns or other injuries due to extremely high temperatures. For electrical workers who operate within proximity of live electrical equipment or perform tasks such as troubleshooting circuits, installing new systems, or repairing faulty connections, wearing FR clothing is imperative. 

Electrical arcs generate immense heat that can ignite regular clothing instantly. However, FR-rated garments have inherent flame-resistant properties which prevent them from catching fire or melting when exposed to extreme heat levels. 

Welding Industry

The welding industry involves various types of welding processes like MIG (Metal Inert Gas), TIG (Tungsten Inert Gas), Stick Welding (Shielded Metal Arc Welding), and more. While these processes are crucial for fabrication and construction, they also pose significant fire risks due to the intense heat generated and the presence of sparks, molten metal, and hot slag. Welders are continuously exposed to potential burn hazards, making FR clothing an essential protective measure. 

The fabrics used in FR-rated clothing act as a barrier against sparks, molten metal droplets, UV radiation, and hot slag splatters. By wearing FR clothing that meets necessary safety standards in terms of material composition and quality, welders can significantly reduce the risk of burns caused by contact with hazardous welding elements. 

Overall, the oil and gas industry, electrical industry, and welding industry each present unique fire hazards that necessitate the use of FR-rated clothing to safeguard workers from burns and other injuries. By adhering to regulations set forth by regulatory bodies like OSHA and investing in high-quality FR garments specific to their respective industries, employers can prioritize worker safety while promoting a secure work environment. 

Advancements in FR Technology

Innovations in fabric technology for increased comfort & and durability

The world of FR-rated clothing has seen significant advancements in fabric technology to enhance both comfort and durability. Manufacturers understand the importance of providing garments that not only protect against flames but also ensure ease of movement and a comfortable fit for the wearer. To achieve this, they have introduced innovative fabrics that offer superior breathability, moisture-wicking properties, and flexibility. 

These advanced materials ensure that workers wearing FR clothing can perform their tasks without feeling restricted or discomforted by excessive heat build-up. Furthermore, the fabrics are engineered to be highly durable, with reinforced stitching and sturdy construction that withstands rigorous use and maintains their protective properties even after repeated washings. 

Introduction to advanced fabrics used in modern-day manufacturing

Modern-day manufacturing processes have introduced a range of revolutionary fabrics specifically designed for FR-rated clothing. One such material is aramid fiber, known for its exceptional flame resistance and strength-to-weight ratio. 

Aramid fibers are commonly used in industries where workers face high levels of heat exposure, such as firefighting or aerospace applications. Another advanced fabric is modacrylic, which combines flame resistance with excellent colorfastness and softness, making it ideal for garments requiring vivid colors while still providing effective protection against flames. 

In addition to these specialized fibers, manufacturers have also embraced blends that combine different materials to create hybrid fabrics with enhanced performance characteristics. For instance, adding flame-resistant cotton to a synthetic fiber blend can improve breathability while maintaining reliable fire protection.

Where to buy FR-Rated clothing, Made in the USA?

NASCO Industries has been a leader in FR-rated clothing – most specifically – FR-rated rain gear for more than four decades. Individuals and companies alike can purchase USA made fr rain gear directly from our website at

We take pride in delivering innovative and reliable products and peace of mind to our customers. Through rigorous testing processes and partnerships with esteemed certification organizations, we strive to exceed expectations, ensuring that our FR rain gear remains at the forefront of quality and safety. 


The innovations discussed above signify a promising future for those working in industries where FR protection is crucial. With the introduction of advanced fabrics that offer increased comfort, durability, and flexibility, workers can perform their tasks confidently, free from the constraints that traditional FR garments may have imposed. This intersection of safety and comfort not only ensures better compliance with safety regulations but also promotes a more positive work environment where individuals can focus on their responsibilities without compromising their well-being.