Underwear Top SPORT-TX Black X Large SFI 3.3

The BELL HELMETS Underwear Top SPORT-TX in Black X Large (SKU BR40064) is a purpose-built base layer designed to meet SFI 3.3 fire-retardant specifications. Built from a fire-retardant blend fabric, this long-sleeve crew neck top provides critical thermal protection for motorsports drivers, pit crew, and high-heat environments where flame resistance is non-negotiable. The SPORT-TX delivers lightweight coverage without compromising mobility—essential for situations where every second counts.

SFI 3.3 certification confirms this garment meets the Sports Car Club of America and international motorsports safety standards for flame protection. The fire-retardant blend construction resists ignition and limits burn-through, a critical requirement in racing, emergency response, and industrial heat environments. The crew neck and long sleeves provide full arm coverage, while the fitted X Large sizing delivers a clean silhouette under racing suits, flight suits, or tactical gear. Weighing just 0.71 lbs, the SPORT-TX adds minimal thermal load while maximizing protection—a key consideration during extended wear in confined or high-activity situations.

This base layer serves competitive drivers, professional motorsports teams, safety personnel in industrial settings, and anyone operating in environments where flame exposure is a documented risk. The SFI 3.3 rating is recognized across sanctioned racing organizations, making it compliant for entry into official events. Users requiring layerable, certified fire protection—whether for track days, road courses, or protective duty—depend on verified specifications like those built into the SPORT-TX line.

BELL HELMETS has established a market presence in safety-critical motorsports apparel, and the SPORT-TX represents the brand's commitment to certification-backed performance. Fire-retardant base layers are foundational to any serious motorsports wardrobe—this top delivers the documented protection standards that sanctioning bodies and safety professionals require.