Underwear Top SPORT-TX Black 2X Large SFI 3.3

The Underwear Top SPORT-TX Black 2X Large SFI 3.3 from BELL HELMETS is a professional-grade fire-retardant base layer engineered for racing drivers, automotive technicians, and motorsport enthusiasts who require certified thermal protection. Designed to meet SFI 3.3 safety standards, this long-sleeve crew neck undergarment serves as a critical first-responder layer beneath racing suits, nomex suits, and protective gear during high-heat environments. Whether you're competing in circuit racing, autocross events, or working in industrial applications with flame exposure risk, this fire-retardant blend underwear top provides essential protection and comfort during extended wear.

Constructed from a fire-retardant blend fabric, the SPORT-TX utilizes advanced materials formulated to resist ignition and limit flame spread in compliance with SFI Foundation specifications. The long-sleeve design with crew neck configuration maximizes coverage across the torso, shoulders, and arms—critical exposure zones during motorsport incidents or thermal exposure. The 2X Large sizing accommodates larger frame athletes while maintaining breathability and mobility, essential when layering beneath restrictive racing suits over extended competition periods. The black colorway resists visible staining and maintains professional appearance across repeated washings and use cycles.

Racers at all competition levels—from amateur club events to professional motorsport operations—trust SFI 3.3-certified base layers as non-negotiable safety equipment alongside helmets and race suits. This BELL HELMETS garment pairs seamlessly under any SFI-approved racing suit, karting gear, or professional motorsport protective ensemble. Fire-retardant base layers also benefit automotive mechanics, welders, and industrial workers exposed to flame or high-temperature environments. Machine washable and durable through hundreds of competition cycles, the Underwear Top SPORT-TX represents an affordable yet critical investment in long-term thermal safety and regulatory compliance.