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 CarbonX Underwear Shirts 20600L Underwear, Shirt, Long Sleeve, CarbonX, Black, Men's Large, Each

Simpson CarbonX Underwear Shirts 20600L Underwear, Shirt, Long Sleeve, CarbonX, Black, Men's Large, Each

$336.44

Simpson Nomex Underwear, T-Shirt, Medium, White, Nomex, SFI 3.3, Each

Simpson Nomex Underwear, T-Shirt, Medium, White, Nomex, SFI 3.3, Each

$215.59

Simpson CarbonX Underwear Shirt Short Sleeve Top Large

Simpson CarbonX Underwear Shirt Short Sleeve Top Large

$215.59

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

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

$358.75

Simpson Nome Head Sock, White, Nomex, Single Large Eyehole Opening, 1 Layer, SFI 3.3 Safety Rating, Each

Simpson Nome Head Sock, White, Nomex, Single Large Eyehole Opening, 1 Layer, SFI 3.3 Safety Rating, Each

$172.27