Simpson Racing CarbonX Ultimate Underwear Top, XX-Large

Gain safety and peace of mind with the CarbonX® Ultimate™ underwear.  It is made from double jersey interlock knit comprised of a patented blend of high-performance fibers and has extraordinary thermal protective properties. It is inherently flame resistant, will not burn, melt, or ignite when subjected to direct flame. Nomex® or CarbonX® Underwear underneath a racing suit will dramatically improve Thermal Protection Performance (TPP) in the case of an accident involving fire. SFI 3.3 approved, includes SFI tag. Designed to deliver the ultimate in base layer thermal protection. TPP rating of 13 cal/cm2 and zero seconds after flame. Lightweight, patented blend of high-performance fibers. Double jersey interlock knit. Long sleeve crew neck top available. Bottoms available. Sizes: Small to XX-Large available. Made in the USA. Learn more about SFI and TPP Ratings by reading our tech article. What are SFI and TPP Ratings?