It is highly reccommended that you add a layer of underwear to all suits (especially any single-layer suit) for any additional protection. The extra layer of flame retardant material is an item that no driver should ever have to use, but, if you need it, you will be glad you have it. The soft knit is hypoallergenic and more comfortable on the skin that the old standby. The double stitching provides added durability.

More From This Category

Simpson Racing Pro-Fit Base Layer, Long Sleeve, 3X-Large, Black

Simpson Racing Pro-Fit Base Layer, Long Sleeve, 3X-Large, Black

$234.18

Simpson CarbonX Head Sock, Black, One Layer, Dual Eyehole Opening, Each

Simpson CarbonX Head Sock, Black, One Layer, Dual Eyehole Opening, Each

$153.98

Simpson Racing Pro-Fit Base Layer, Long Sleeve, 3X-Large, White

Simpson Racing Pro-Fit Base Layer, Long Sleeve, 3X-Large, White

$180.26

Simpson Nomex Underwear, Pants, Full Length, Nomex, Small, White, Each

Simpson Nomex Underwear, Pants, Full Length, Nomex, Small, White, Each

$215.59