Description
SFI 3.3 fire-resistant underwear is essential safety equipment for any driver operating in a sanctioned racing environment—it’s the layer between you and a worst-case scenario. Simpson’s CarbonX fabric provides proven thermal protection without the bulk or discomfort of heavier alternatives, allowing you to focus on your performance rather than your gear. This short-sleeve crew neck design offers optimal mobility for extended track sessions while meeting all major racing sanctioning body requirements.
- SFI 3.3 rated
- CarbonX material
- Soft knit construction
- Short sleeve
- Crew neck
- Black
- X-Large size
- Sold individually









