Proforce SFI 3.3 fire retardant socks are made from 100 percent Nomex® and available in many different sizes. All Proforce fire retardant underwear garments are machine washable and retain their shape well.

More From This Category

Simpson Racing Head Sock, Pro-Fit Balaclava, Single Eye, Black

Simpson Racing Head Sock, Pro-Fit Balaclava, Single Eye, Black

$158.87

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 CarbonX Underwear Shirts Short Sleeve Top XXLarge

Simpson CarbonX Underwear Shirts Short Sleeve Top XXLarge

$226.75

Simpson CarbonX Underwear Shirts 20600S CarbonX Long Sleeve Top Small

Simpson CarbonX Underwear Shirts 20600S CarbonX Long Sleeve Top Small

$306.69

Simpson Racing CarbonX Underwear Fire Retardant Socks, Black, SFI 3.3, One Size Fits All, Pair

Simpson Racing CarbonX Underwear Fire Retardant Socks, Black, SFI 3.3, One Size Fits All, Pair

$92.16