Underwear Top SPORT-TX White Large SFI 3.3

The BELL HELMETS Underwear Top SPORT-TX in White, Large, SFI 3.3 is a fire-retardant base layer engineered for motorsport safety and high-performance racing environments. This long-sleeve crew neck garment meets SFI 3.3 certification standards, providing critical thermal protection under a racing suit during intense driving conditions. Built from a fire-retardant blend fabric, it serves as the foundational protective layer for drivers, pit crew, and motorsport professionals who require reliable flame-resistant underwear engineered to automotive racing specifications.

SFI 3.3 certification indicates this underwear top meets established safety standards for racing apparel, verified for flame resistance and thermal protection. The fire-retardant blend construction is designed to resist ignition and limit char propagation in high-temperature scenarios—a critical feature in motorsport where seconds matter. The crew neck design and long-sleeve configuration provide full upper-body coverage, while the fabric composition balances thermal protection with breathability during extended driving sessions. Sizing in Large accommodates standard racing suit fitment, ensuring the base layer functions without excess bulk or restriction under the outer suit.

This product is essential for professional racers, amateur motorsport competitors, and pit crew members operating in sanctioned racing environments where SFI-rated protective equipment is required or strongly recommended. Racing series, track facilities, and safety-conscious drivers specify certified fire-retardant base layers to minimize injury risk in the event of fuel-related thermal incidents. The SPORT-TX series from BELL HELMETS represents purpose-built racing underwear—not general athletic wear—designed specifically for motorsport applications where standard clothing would be inadequate for safety requirements.