Frequently Asked Questions


How is flame resistance measured?

What other tests are conducted on your FR fabrics?

Who uses your FR fabric? Where do your FR fabrics wind up?

What makes you different?

What are some of the benefits of producing FR fabrics in the U.S.?

How do you ensure your quality?

What is the difference between fire retardant fabric and flame resistant fabric?

What key points should I consider when choosing FR garments?

How many FR fabrics do you offer?

Why does fabric selection matter?

Are your FR products guaranteed?

What are your recommended laundering instructions?


  How is flame resistance measured?

The basic test for flame resistance is ASTM D6413.  In this test fabric specimens are exposed to a flame for 12 seconds followed by tearing the damaged area with a small weight.  The length of the damaged area is measured and reported as char length.  If a fabric continues to burn after the 12 second exposure has ended this burning is timed and reported as afterflame time.  Every lot of our flame resistant fabric is tested by this method before and after 100 industrial wash and dry cycles to confirm the durability of the flame resistant properties.

  What other tests are conducted on your FR fabrics?

In addition to the Vertical Burn Test (ASTM D6413), we use the Kinectrics Laboratories in Toronto for electric arc testing by ASTM F1959.  Our fabrics are also tested on the thermal manikin at North Carolina State University known as PyromanTM as part of the requirements for NFPA 2112.  We also use Underwriters Laboratories for 3rd party testing and component recognition to standards like NFPA 2112 and CGSB 155.20.

  Who uses your FR fabric? Where do your FR fabrics wind up?

Mount Vernon FR is proud to partner with some of the best in the business. Many of the world’s leading apparel manufacturers and brands turn to Mount Vernon FR for their flame resistant fabric needs. Click here to check out who’s using Mount Vernon FR. Our flame resistant fabrics are used for retail and rental uniforms, military applications, and for workwear that is compliant to ASTM F1506 as required for NFPA 70E clothing, which is the standard for electrical safety in the workplace, and NFPA 2112, which is the standard for flash fire protection.

  What makes you different?

Our vertically integrated manufacturing facilities, which are based in Trion, Georgia, provide us with the total in-house control of more than 25 major processes, including fiber selection, spinning, weaving, dyeing, FR treatment and finishing. Every step in the production process can affect the flame resistant properties of the fabric, and our customers have the added security of knowing that we not only control, but actually complete every step of the process in-house. We also have the largest vertically integrated manufacturing facility for denim in North America at the Trion, Georgia, location. Our fabrics are Made in the USA from fiber to the finished yard.

  What are some of the benefits of producing FR fabrics in the U.S.?

Our U.S.-based capacity allows us to continue to provide consistent 6–8 week delivery of our flame resistant fabrics while also maintaining in-stock inventory on core products and colors that will be available for immediate shipment.

  How do you ensure your quality?

More than 3,000 computer-monitored control points and extensive quality assurance testing ensure that our FR fabric will be produced with the highest level of reliability, quality, durability, color consistency and shrinkage control.

  What is the difference between fire retardant fabric and flame resistant fabric? 

Flame resistance is the characteristic of a fabric to resist ignition and to self-extinguish if ignited. Flame retardant refers to a chemical substance used to impart flame resistance. Simply put, flame retardant materials may be used to make fabrics flame resistant.

  What key points should I consider when choosing FR garments?

You should consider the following FR performance properties for your particular job and verify with your employer:
o Arc rating
o Predicted % body burn
o Weight
o Blend
o Special Properties
o Flex
o AmDry
o Extended Durability

  How many FR fabrics do you offer?

Customers can choose from more than 20 standard FR fabrics offered under our AMTEX, RESILIENCE and PHOENIX brands. However, with our unique MY•FR program, your choice is really unlimited – we can customize an FR garment program to the specific needs of your workforce.   We have more than 50 products that are component recognized to the NFPA 2112 standard for flash fire protection.  These products are also compliant with the requirements of ASTM F1506 for electric arc protection. Click here to see our fabric collections.

  Why does fabric selection matter?

Whether selecting from our AMTEX, RESILIENCE or PHOENIX brands, or working with us to develop a customized FR fabric under our MY•FR program, your workforce will not have to sacrifice comfort or styling in their FR workwear. You not only have the security of knowing that your workforce will have the highest quality FR garments available, but they will wear them with pride and satisfaction. Our variety of fabrics allows us to help you find the perfect fit for your needs.

  Are your FR products guaranteed?

Yes. The durability of the flame resistance of our FR fabric is guaranteed for the life of the garment, provided that all recommended laundering instructions are followed.

  What are your recommended laundering instructions?

Download Mount Vernon’s Preferred Laundry Guide and FR Care and Maintenance Guide for more information.