Underwear Top SPORT-TX Black Large SFI 3.3

The BELL HELMETS Underwear Top SPORT-TX in black, size large, is a fire-retardant base layer engineered for high-temperature environments where thermal protection is non-negotiable. This SFI 3.3-certified long-sleeve crew-neck top serves as the essential first layer in motorsports safety systems, providing lightweight thermal defense without sacrificing mobility or comfort during extended track sessions, racing events, or high-performance driving scenarios.

Constructed from a fire-retardant blend fabric, this SPORT-TX underwear top meets SFI 3.3 certification standards, which establish baseline thermal protection requirements for motorsports apparel. The long-sleeve design extends coverage to the wrists, while the crew neck offers compatibility with helmets and neck braces commonly used in competitive racing. The fabric composition is specifically formulated to resist ignition and limit flame spread, critical attributes for drivers who require layered thermal protection in cockpit environments. At 0.63 lbs, the garment adds minimal weight while delivering the protective performance demanded by SFI specifications.

This base layer is designed for professional and amateur motorsports competitors, particularly those in circuit racing, off-road racing, and performance driving disciplines where SFI-certified fire-retardant apparel is required or strongly recommended. The black colorway integrates seamlessly under racing suits and other protective gear. The SPORT-TX underwear top functions as part of a complete thermal protection system—worn beneath outer fire-retardant suits—and is suitable for drivers who prioritize regulatory compliance and thermal safety without compromising fit or feel during intense driving activity.

BELL HELMETS has established itself as a trusted manufacturer of motorsports safety equipment and apparel. When selecting SFI-certified base layers, the specific certification level (SFI 3.3) and fit compatibility with your racing suit and safety harness are essential considerations. This size-large garment integrates into a complete layered thermal defense strategy common among competitive drivers and professional racing teams.