Our K1 auto racing suit is made of double layer DuPont Nomex® III and is SFI 3.2A/5 rated. Quilted from the outside with a ribbed collar, wrist cuffs, ankle cuffs, belt and epaulette, and featuring a custom back-stretched panel for added comfort and ribbed elastic under the arms to facilitate 360 degree movement, the K1 auto racing suit is a comfortable, useable fire suit that is specially designed for auto racing applications. We like to think that the K1 auto racing suit combines the safety of a Nomex® fire suit with the comfort and value of a K1 Race Gear racing suit into one unbeatable package. We're confident that you won't be disappointed with the K1 auto racing suit!