Sparco's Shield Pro line of racing underwear provides the highest level of protection, comfort and breathability on the market today. Designed using a driver's natural seating position, excellent fit and comfort are insured through strategic weaving of the seamless, ultra-soft stretch Nomex material. Two different woven materials are applied in key areas: a thin stretch material for maximum comfort, or a double-perforated panel for increased breathability. Treated with Sparco's X-Cool treatment to help maintain and control body temperatures.