The Kosto Dazzle Arc Flash Pants (VPKF21) are engineered to deliver Category 2 arc flash protection while maintaining lightweight comfort and long-term durability. Designed for demanding industrial environments, these flame-resistant work pants provide an ATPV rating of 12 cal/cm², ensuring reliable protection against arc flash hazards without compromising ergonomics.

Constructed from a 250 gsm ripstop fabric blend incorporating modacrylic, cotton, para-aramid, polyamide, and antistatic fibers, they balance strength, breathability, and flexibility. The expandable hem system allows the inseam to extend from 31" to 33" by removing the contrasting topstitch, offering practical field adjustability. Reinforced with Nomex® high-resistance threads and built with functional cargo, knee, and welt pockets, these arc-rated pants are ideal for professionals who require certified flame-resistant protection combined with mobility and performance.

Key Features

Category 2 Arc Protection: ATPV 12 cal/cm² certified for arc flash hazards in electrical environments.
Heat & Molten Splash Resistance: Compliant with EN 11612 and EN ISO 11611 for resistance to heat, flame, and welding projections.
Antistatic Protection: EN 1149-5 certified to reduce electrostatic discharge risks.
Expandable Hem System: Adjustable inseam extends from 31" to 33" by releasing internal topstitch for added length flexibility.
Ripstop Flame-Resistant Fabric: 250 gsm blend enhances tear resistance while maintaining lightweight wearability.
Nomex® High-Resistance Threading: Reinforced seams increase durability in high-stress zones.
Ergonomic Crotch Gusset: Improves mobility and comfort during crouching or climbing.
Functional Storage Design: Two cargo pockets, two back welt pockets with hidden flap, and side pockets for daily jobsite tools.
Kneepad Compatibility: Integrated knee pockets designed for 25 cm x 15 cm kneepads with hook-and-loop closure.
Secure Closure System: YKK zipper with double flap and concealed shank button for enhanced protection.
Contoured Back Waistband: 3-inch waistband provides secure support when bending or crouching.

Intended Use

These arc-rated flame-resistant pants are designed for professionals exposed to electrical arc flash risks, welding operations, and industrial heat hazards. They provide certified protection while supporting daily mobility and long shifts in demanding environments.

Recommended Application:

Electricians and electrical maintenance technicians
Power generation and utility workers
Industrial mechanics and millwrights
Welding professionals (light welding – Class 1)
Oil & gas and petrochemical workers
Manufacturing and heavy industry personnel

Product Specifications

Model: Dazzle Arc Flash Pants
Manufacturer Code: VPKF21
Product Type: Flame-resistant arc flash work pants
Fabric Composition: 49% Modacrylic / 42% Cotton / 5% Para-aramid / 3% Polyamide / 1% Antistatic
Fabric Weight: 250 gsm (7.37 oz/yd²) Ripstop
Thread: Nomex® resistant threads
Inseam: 31" standard (extendable to 33")
Waist Sizes: 28 to 48
Closure: YKK zipper with concealed shank button
Kneepad Pocket Size: 25 cm x 15 cm
Care: Wash at 60°C; no chlorine or soap-based detergents; tumble dry allowed

Certifications and Standards

NFPA 70E
ASTM F1506 (ASTM F1959)
Category 2 (CAT 2)
ATPV 12 cal/cm²
EN 11612 (A1 A2 B1 C1 E3 F1)
EN ISO 11611 Class 1 (A1+A2)
EN 1149-5 Antistatic
CE Certified