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 Nomex Underwear Socks One Size Fits All, SFI 3.3

Simpson Racing Nomex Underwear Socks One Size Fits All, SFI 3.3

$76.51

Simpson Racing CarbonX Ultimate Underwear Long Sleeve Top XXX-Large Black

Simpson Racing CarbonX Ultimate Underwear Long Sleeve Top XXX-Large Black

$327.14

Simpson Racing Fire Retardant Underwear, Soft Knit Nomex, Long Sleeve Crew Neck Top, Small

Simpson Racing Fire Retardant Underwear, Soft Knit Nomex, Long Sleeve Crew Neck Top, Small

$197.00

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

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

$197.00