Nomex Underwear Small SFI

The Nomex Underwear Small SFI by RJS SAFETY is a professional-grade two-piece thermal protection system engineered for drivers and motorsports enthusiasts who demand fire-resistant base layers. Whether you're competing in sanctioned racing events, performing high-heat fabrication work, or building custom vehicles in environments with combustion risks, this garment provides critical protection where standard cotton fails. SFI 3.3 certification means it meets the Sport Car Club of America's rigorous flammability standards, making it essential equipment for anyone operating in motorsports or automotive performance environments.

Constructed from Nomex—a aramid fiber material engineered to resist ignition and thermal degradation—this two-piece set includes a long-sleeve crew-neck top and full-length bottoms designed to protect skin from flash fires and sustained heat exposure. Nomex doesn't melt or drip like synthetic blends; instead, it chars as a protective barrier, giving occupants critical seconds in emergency situations. The white colorway provides high visibility in workshop and pit environments, while the crew-neck design allows easy layering under racing suits or heavy work gear without bulk or restriction at the neck.

This small-sized set is ideal for drivers, mechanics, and fabricators who work regularly in high-heat or fire-risk automotive environments. It serves as the foundational thermal layer under racing suits during track days, road course competitions, and street rod events where SCCA or similar safety standards are enforced. The SFI 3.3 rating ensures compliance with sanctioned racing organizations, while the lightweight construction—weighing just 1.07 lbs—eliminates added fatigue during long days under the hood or in the driver's seat. Use as base layer protection whenever safety regulations or hazardous conditions demand fire-resistant clothing.