Underwear Top SPORT-TX White Small SFI 3.3

The Underwear Top SPORT-TX White Small SFI 3.3 by BELL HELMETS is a professional-grade fire-retardant base layer engineered for motorsports competitors and high-heat environments. Designed as a crew-neck, long-sleeve undergarment, this garment serves as a critical protective layer beneath racing suits, providing essential thermal protection and flame resistance when paired with outer racing apparel. Whether you're a circuit racer, autocross competitor, or professional driver, this fire-retardant blend underwear meets SFI 3.3 safety certification standards for sanctioned motorsports competition.

Constructed from a specialized fire-retardant blend fabric, the SPORT-TX delivers multi-layer protection by reducing ignition risk and limiting flame spread in emergency situations. The crew-neck design and long-sleeve construction ensure full arm and torso coverage, while the lightweight construction at 0.59 lbs prevents bulk under your racing suit. SFI 3.3 certification confirms this garment meets stringent flammability standards recognized by racing sanctioning bodies including NHRA, SCCA, and other professional motorsports organizations, making it a trusted choice for drivers who demand compliance and reliability.

Professional racers and safety-conscious drivers benefit most from this layering system, as it integrates seamlessly beneath SFI-rated racing suits for dual-layer fire protection. The small size provides a fitted profile that minimizes excess fabric, reducing heat accumulation while maintaining consistent contact with the skin for optimal thermal protection. This garment is sold individually and works in conjunction with SFI-approved outer racing apparel; verify your racing suit and helmet meet matching SFI standards for complete compliance at sanctioned events. White colorway enhances visibility during pit lane operations and storage.