The DEWALT DST921-M Class 2 Modacrylic FR Long Sleeve T-Shirt combines flame-resistant protection with the high-visibility requirements of a busy worksite. Made from a modacrylic/cotton/polyester blend, this shirt is designed for electricians, utility linemen, and industrial workers who need an ARC rating of 10.0 cal/cm² while staying comfortable in warmer conditions. With its ANSI 107-2010 Class 2 background and reflective material, it helps you stay visible and safe on roads, highways, and job sites.
DEWALT DST921-M Class 2 FR Long Sleeve T-Shirt Performance
This shirt meets ASTM F1506 standards and carries an ARC rating of 10.0 cal/cm², giving you a base layer of arc-flash protection. The modacrylic blend naturally resists flame and won't melt onto your skin like synthetic fabrics. It's manufactured in the USA with global materials, and the jersey knit feels like a regular tee—making it easier to wear all day.
Safety Certifications and Visibility
The DST921-M meets ANSI 107-2010 as a Class 2 garment, with high-visibility green background and reflective tape. This is essential for roadside work, construction zones, and any area where you need to be spotted from a distance. It's also rated for long-sleeve coverage, which adds protection to your arms without needing an extra layer.
Designed for Comfort and Durability
Unlike stiff FR outerwear, this long-sleeve tee is breathable and flexible. The modacrylic/cotton/polyester blend wicks moisture and resists shrinking, so it holds up through repeated washes. The hi-vis green stays bright when you follow the care instructions, and the reflective material maintains its sparkle for the life of the garment when properly maintained.
Who Should Wear the DST921-M
If you work in electrical utility, industrial maintenance, welding, or oil and gas, this shirt is a practical choice for everyday FR and visibility. It's also a great layering piece under a heavier FR coat in cold weather. For professionals who need compliant protection without overheating, the DST921-M is a smart investment.
