Sparco underwear continues to be a market leader in the race world. The implementation of unique techniques when designing products has helped place them there. Sparco base layer undergarments use X-Cool treatment - micro capsules that draw heat away from the body- for supreme comfort on hot race days. Another added feature - Sparco designed part of their base layer undergarment line with the driver in the seated position, ensuring proper fitment and ultimate comfort. What would you expect from a company developed by racecar drivers? Performance, reliability, and safety. Sparco.