Simpson CarbonX Undershirt

CarbonX Ultimate Underwear is made from double jersey interlock knit comprised of a patented blend of high-performance fibers. It is inherently flame resistent, will not burn, melt, or ignite when subjected to direct flame.
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
Color:  Black