Material: Often 100% Flame Retardant cotton (approx. 315 g/m2), 88% cotton/12% nylon (FR-Tech), or blends with modacrylic/aramid.
Safety Standards: Compliance with standards such as EN ISO 11612, NFPA 2112 (flash fire), and ASTM F1506 (arc flash).
Closure: Concealed heavy-duty brass or metal zippers with Velcro or snap-button flaps to prevent spark penetration.
Visibility: Equipped with reflective tape on shoulders, arms, and legs for enhanced visibility in low-light conditions.
Comfort/Functionality: Features often include elasticated waistbands, adjustable ankle/wrist cuffs, action backs for movement, and multiple storage pockets.