Arc Flash Wear

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DRIFIRE® FR/AR Range Flex™ Pro Relaxed Work Pant

Premium Dual-Hazard FR/AR Protection: Arc Flash, Flash Fire, Breathable, Built-in Flexibility. Flex™ Canvas 9.5oz/322gsm - 14.0 CAL | CAT 2

Since 1935, National Safety Apparel has been a leader in delivering advanced safety solutions for workers in high heat and industrial environments. NSA's extensive range of USA-made PPE includes protective workwear for workers facing extreme heat, arc flash, flash fire, molten metal, cut and abrasion hazards. Whether in foundries, mills or industrial manufacturing, NSA solutions are designed to safeguard workers in the toughest environments.

DRIFIRE® high-performance FR/AR workwear is built for those who demand both comfort and protection in tough environments. With innovative designs and advanced fabric technology, DRIFIRE® workwear works as hard as you do.

The same technology that keeps American troops safe abroad protects workers around the globe, helping workers to perform the most hazardous tasks with confidence. DRIFIRE® is mission-driven and performance-obsessed, delivering workwear that supports workers every step of the way.

APPLICATION: Arc Flash, Flash Fire, High-Risk Industrial Environments.

DRIFIRE® FR/AR Range Flex™ Work Pant

  • NFPA 70E for Arc Flash, UL Certified to NFPA 2112 for Flash Fire, ASTM F1506 for Arc Flash, CSA Z462 for Arc Flash (Canada), OSHA 1910.269.
  • Flex™ Canvas 9.5oz / 322gsm.
  • ATPV - 14.0 cal/cm2 PPE CAT 2.
  • Colours – Navy, Black, Khaki.
  • ATPV 14.0 CAL PPE CAT 2.

  • Inherently flame resistant.

  • No-melt, no-drip.

  • Advanced abrasion resistance. 

  • No-wash-out security.

  • Simultaneous arc flash and flash fire protection. 

Flex™ Canvas Shell (9.5oz / 322gsm)

Flex™ Canvas fabric is a high-performance, dual-hazard material engineered to balance rugged industrial safety with modern, ergonomic comfort. It is utilised in premium industrial workwear and transforms traditionally stiff canvas into highly mobile protective workwear.

View more NSA FR/AR Work Pant Apparel by downloading the NSA 2026 Catalogue (Refer pages 21 to 23).

Description: The DRIFIRE® Range Flex™ Pro Relaxed FR/AR Work Pant is the next evolution in DRIFIRE's FR/AR Pant range. It delivers dependable performance without sacrificing comfort. Made from tough, flexible canvas, the Pant is built to handle demanding conditions while allowing comfortable movement throughout the working day.

Description: Elevate your professional appearance both on and off the job with a Pant that combines functionality with style. Enjoy the confidence of a sleek, modern look without compromising on safety. The DRIFIRE® Range Flex™ FR/AR Work Pant is built to last, offering exceptional durability and long-lasting performance, ensuring it stands up to the rigours of your demanding work environment.

  • NFPA 70E for Arc Flash, UL Certified to NFPA 2112 for Flash Fire, ASTM F1506 for Arc Flash, CSA Z462 for Arc Flash (Canada), OSHA 1910.269.
  • Fabric – Flex™ Canvas.
  • Fabric Weight - 9.5oz / 322gsm.
  • ATPV - 14.0 cal/cm2 PPE CAT 2.
  • Product Number PNT-RFRU-NB-_ _X_ _ (Navy)
  • Product Number PNT-RFRU-KH-_ _X_ _(Khaki)
  • Modern Comfort: Durable canvas with built in flexibility.
  • Triple Needled Seams: Adds durability in areas where it counts the most.
  • Classic Relaxed Fit: The roomiest option for comfort and mobility, relaxed through waist, seat and thighs.
  • Reinforced Belt Loops: Added functionality and durability.
  • Reinforced Knife Clip Patch: Added functionality and durability, allowing you to conveniently clip a knife without causing tearing.
  • Double Layered Knees: Provides reinforcement in a high mobility area for demanding tasks.
  • Straight Leg: Allows for easy donning and doffing over work boots.
  • Gusseted Crotch: Improves mobility and reduces strain.
  • Angled Front Pockets: Allows for easy access, helping keep contents securely in place.
  • Utility and Cargo Pockets: Maximises storage options, providing multi-functional storage for tools and personal belongings.
  • Two rear patch pockets add extra storage for small items.
  • Sizes: Waist 30" - 50" / 76cms - 127cms | Inseam 30" - 38" / 76cms - 97cms. The Product PDF / Sizing download shows Product Information and a Body Measurement Chart. The body measurements are in inches. To convert centimetre measurements to inches, divide your centimetre measurements by 2.54 and select the corresponding inch measurements from the chart.
  • MOQ - 5 units (across different sizes to reach MOQ).
  • Product Number PNT-FFN-_ _X_ _ (Navy)
  • Product Number PNT-FFB-_ _X_ _ (Black)
  • Product Number PNT-FFK-_ _X_ _ (Khaki)
  • Built to hold up to the toughest conditions and provide reliable protection day after day.
  • Crafted from lightweight, 9.5oz/322gsm Flex™ Canvas stretch material, these pants deliver exceptional comfort and manoeuvrability without compromising on durability.
  • Straight cut with fitted hips and thigh, leg openings perfectly sized for boots.
  • Two deep, front-squared pockets provide convenient storage solutions for essential tools and personal items.
  • Two rear patch pockets add extra storage for small items.
  • Sizes: Waist 30" - 50" / 76cms - 127cms | Inseam 30" - 36" / 76cms - 91cms.
  • MOQ - 5 units (across different sizes to reach MOQ).
  • Read the garment label and launder per instructions on garment label.
  • Machine wash warm on maximum 60°C (140°F). Use mild detergent. Tumble dry on medium setting.
  • DO NOT iron, use chlorine bleach, hydrogen peroxide, fabric softener or starch.
  • Wash according to the instructions above to remove any contaminants in order to maintain fabric performance when the garment becomes soiled with dirt, grease or oils.
  • If contaminants cannot be removed after laundering, it is best to discontinue use of the garment.