Carbon X Underwear Top Small Long Sleeve

The Carbon X Underwear Top Small Long Sleeve is a professional-grade racing undergarment engineered for drivers who demand maximum thermal protection and moisture management in high-performance automotive environments. Built to SFI 3.3 safety certification standards, this crewneck long-sleeve base layer serves as the foundation for serious racers, track enthusiasts, and professional drivers who operate in vehicles with elevated cabin temperatures or emergency egress demands. Whether you're spending hours in a road-course cockpit, endurance racing, or simply preparing for worst-case scenarios, this undergarment provides essential fire-resistant protection that complements your overall safety system.

Simpson Safety's CarbonX construction delivers proven thermal barrier technology with exceptional breathability—critical for maintaining core temperature regulation during extended driving sessions without compromising moisture wicking or comfort. The material composition resists ignition and char propagation while remaining lightweight enough for everyday wear beneath racing suits or nomex layers. The crewneck design minimizes fabric bulk at the shoulder and neck transition, reducing pressure points and chafing during repetitive steering inputs and g-force exposure. Long sleeves provide continuous arm coverage, eliminating exposed skin vulnerabilities that could occur during aggressive driving or impact scenarios.

Drivers pursuing SCCA, IMSA, or club-level motorsports certifications will find this small-size offering compatible with most standard racing suit architectures. The compact 0.72 lb weight ensures minimal thermal load while delivering measurable safety compliance—a non-negotiable baseline for serious competitors and track day participants. Install by layering beneath your primary racing suit or fire-resistant outer garments; the low-profile fit prevents bunching under harness systems or within confined cockpit spaces. SFI 3.3 certification meets entry-level racing sanctioning body requirements, making this an accessible upgrade for drivers transitioning into organized competition or upgrading aging safety equipment.