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 Ultimate Underwear Bottoms XLarge

Simpson CarbonX Ultimate Underwear Bottoms XLarge

$264.53

Simpson CarbonX Ultimate Underwear Bottoms Medium

Simpson CarbonX Ultimate Underwear Bottoms Medium

$264.53

Simpson Racing Underwear, Arc Boxers, Large, Black, 2-Pack

Simpson Racing Underwear, Arc Boxers, Large, Black, 2-Pack

$165.30

Simpson Helmet Skirt, Outer Style, Contoured Design, Carbon, Black, SFI 3.3/5, Each

Simpson Helmet Skirt, Outer Style, Contoured Design, Carbon, Black, SFI 3.3/5, Each

$165.30

Simpson CarbonX Underwear Shirts Short Sleeve Top Small

Simpson CarbonX Underwear Shirts Short Sleeve Top Small

$126.04

Simpson Racing Underwear, Simpson Compression Fit S/S Top Small Black

Simpson Racing Underwear, Simpson Compression Fit S/S Top Small Black

$23.56