Underwear PRO-TX Top White Small SFI 3.3

The BELL HELMETS Underwear PRO-TX Top White Small SFI 3.3 is a fire-retardant base layer engineered for high-heat environments where thermal protection is non-negotiable. Built to meet SFI 3.3 standards, this long-sleeve crew neck top provides critical insulation for drivers, rescue personnel, and motorsport competitors who operate in conditions where exposure to flame or intense radiant heat poses a genuine risk.

The fire-retardant blend fabric is engineered to resist ignition and self-extinguish rather than melt or shrink when exposed to direct flame, a critical distinction in motorsports and emergency response scenarios. The SFI 3.3 certification confirms compliance with the Sports Car Club of America fire protection standard, meaning this layer meets the same thermal requirements specified in competition rulebooks and professional racing protocols. The long-sleeve design provides full arm coverage without bulk, and the crew neck construction allows for layering beneath helmets or other protective gear without interference or pressure points.

This garment is essential for professional racing drivers, autocross competitors, off-road motorsport participants, and any operator working in environments where thermal protection is mandated by safety regulations or insurance requirements. The small size is cut for a fitted profile, allowing unrestricted movement within a cockpit, safety cage, or protective suit while maintaining consistent fabric contact for optimal thermal performance. Lightweight at 0.5 pounds, it functions as a standalone base layer or as part of a multi-layer fire protection system.

SFI 3.3 certification is widely recognized across competitive motorsports, including road racing, off-road competition, and enclosed cockpit environments. This product is purchased individually rather than as part of a full suit, making it an ideal replacement or upgrade layer for drivers who already maintain SFI-rated protection systems or who need additional coverage without purchasing an entire new suit.