Manufacturers of some of the racing industries top SFI approved gear, you'll find Simpson products at your local track all the way to the cup series. Simpson racing head socks are knitted from extra-plush Nomex. Simpson head socks are double layered in critical areas for comfort and are designed to be worn comfortably under most helmets. SFI 3.3 rated, these head socks come available in white or black and with single or dual eyeports. The next time you strap in, make sure you're using Simpson products!