Sparco Shield Tech Fire Resistant Racing Undershirt - FIA 8856-2018Sparco's Shield 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