Underwear PRO-TX Bottom White Medium SFI 3.3

The BELL Underwear PRO-TX Bottom White Medium SFI 3.3 is a professional-grade fire-retardant base layer engineered for high-performance motorsports and track environments. Built to meet SFI 3.3 certification standards, this bottom garment is essential for drivers, pit crew, and automotive enthusiasts who demand maximum protection during high-heat operations. Whether you're running on the circuit, conducting engine work in extreme conditions, or modifying vehicles in a performance shop, this fire-resistant underwear provides a critical first line of defense against thermal hazards and flash exposure.

Constructed from a premium fire-retardant blend, the PRO-TX bottom combines lightweight breathability with advanced thermal protection. The SFI 3.3 rating certifies compliance with the Society of Automotive Engineers' strict flammability standards, ensuring reliable performance in unexpected ignition scenarios. The white colorway aids in heat reflection and visibility, while the medium sizing offers a tailored fit that allows unrestricted movement during extended driving sessions or mechanical work. The compact 0.55 lbs weight ensures minimal bulk without compromising protective coverage—a crucial balance for drivers who prioritize both safety and comfort during long hours in the cockpit or under the hood.

This garment is ideal for competitive drivers, racing mechanics, fabricators, and serious automotive enthusiasts who work in high-temperature or potentially hazardous environments. Use it as a foundational layer beneath racing suits, nomex overalls, or protective race gear to maximize thermal defense. The BELL PRO-TX bottom integrates seamlessly with industry-standard racing suits and complements any professional-grade motorsports safety ensemble. For anyone serious about vehicle modification, track days, or professional automotive work, SFI-certified base layers are a non-negotiable safety investment that meets recognized industry protection benchmarks.