The Kosto™ THKF20 and THKF50 FR Balaclavas provide advanced protection against cold, wind, and arc flash hazards. Made from a double-layer knit of 49.5% Kermel®, 49.5% FR Viscose, and 1% antistatic fiber, they deliver both comfort and compliance with stringent electrical safety standards. Lightweight, breathable, and flame-retardant, these balaclavas shield the head and neck while maintaining flexibility for all-day wear. Certified to ASTM F1506, F1959, and NFPA 70E, they provide CAT 3 arc flash protection with an ATPV rating of 33 cal/cm², making them an essential choice for workers in high-risk environments.

Key Features

High-level arc protection: Rated CAT 3 with ATPV 33 cal/cm² for reliable arc flash resistance.
Durable double-layer knit: Combines Kermel® and FR viscose for strength, safety, and comfort.
All-season insulation: Shields against cold winds and low temperatures in outdoor or unheated worksites.
Universal fit: Extensible material ensures compatibility with most head sizes and safety helmets.
Breathable construction: Maintains comfort during extended wear without overheating.
Easy maintenance: Machine washable and tumble dry safe with FR performance retained.

Intended Use

This FR and arc-rated balaclava is designed to be worn under safety helmets or as a standalone protective layer in hazardous and cold environments. It is particularly valuable in situations where electrical arc protection and thermal comfort are both required.

Electrical utility workers
Oil, gas, and petrochemical workers
Construction and maintenance crews in winter conditions
Industrial electricians and technicians exposed to arc hazards
Mining and heavy industry professionals working in cold or windy environments

Product Specifications

Product type: FR and Arc Flash balaclava

Model numbers: THKF20, THKF50
Materials: 49.5% Kermel®, 49.5% FR Viscose, 1% antistatic
Construction: Double-layer knit, extensible
Size: Universal fit (width 15.24 cm / 6.375 in; length 43.1 cm / 17.375 in)
Washing: Machine wash at 60°C (140°F), tumble dry low, do not bleach, do not use softener

Certifications and Standards

ASTM F1506
ASTM F1959
NFPA 70E
Arc flash protection: CAT 3, ATPV 33 cal/cm²