Nomex undergarments provide a dramatic increase in protection when worn with a driver's suit. Flame resistant underwear and socks are required by many race sanctioning bodies. This long sleeve top from OMP is made of a very comfortable single layer soft knit blend of Nomex and aramid fibers. This is not the rough "waffle weave" fabric. You don't need to wear an undershirt under this top. External seams add to comfort. Top features long sleeves and a mock turtleneck. FIA 8856-2000 homologated and SFI 3.3 approved. Natural off-white color only.