Underwear PRO-TX Top White Medium SFI 3.3

The BELL Underwear PRO-TX Top White Medium SFI 3.3 is a professional-grade fire-retardant base layer engineered for drivers, mechanics, and motorsports enthusiasts who demand superior thermal protection without compromise. This long-sleeve crew neck top serves as a critical safety foundation beneath racing suits, heavy protective gear, or shop work where heat exposure or welding sparks present a genuine hazard. SFI 3.3 certification ensures compliance with the Sports Car Club of America (SCCA) and similar sanctioning bodies, making it mandatory for competitive track events and many professional automotive environments.

Built from a fire-retardant blend fabric, this top provides reliable protection against flash exposure and sustained heat without the brittleness of inferior synthetics. The long-sleeve design with fitted crew neck offers full arm coverage while maintaining breathability—critical for extended wear in high-temperature cockpits or fabrication shops. At just 0.55 lbs, the garment remains lightweight enough for layering under racing suits or as a standalone base layer, allowing full range of motion during vehicle operation or mechanical work. The white colorway enhances visibility under heavy outer gear and meets SFI visibility standards for motorsports competition.

This underwear top benefits track racers, professional mechanics, fabricators, and weekend warrior drivers preparing for sanctioned events or serious shop environments. Medium sizing accommodates most builds while maintaining the snug fit necessary for safety gear worn over top; always verify fit before committing to competition or high-risk work. The BELL brand heritage in motorsports protection ensures that every stitch and material choice reflects decades of real-world performance data, making this an investment in proven thermal and flame defense rather than a commodity garment.