IMPACT’s soft yet durable fire retardant underwear is form-fitting and hand-crafted with a flat interlock stitch to minimize pressure points while providing cooling comfort through the use of our exclusive moisture-wicking interlock knit Nomex® material. Sportsman Series Nomex® underwear is ideally suited for the grassroots racer looking for a comfortable and safer alternative for under the driving suit, and is available in short or sleeve tops and shorts. Impact’s fire retardant Nomex® underwear works perfectly under any driving suit and provides an additional layer of valuable protection. This is NOT approved for Race Series needing SFI spec underwear.* Complies with the applicable FR/TTP ratings of the SFI 3.3 specification.