The Shield RW-9 line of Nomex® undergarments provides the highest level of breathability, comfort and protection. When designing this line, Sparco studied the driver’s sitting position to ensure ultimate fit and comfort. Shield RW-9 uses a seamless construction with ultra-soft stretchable material. Three are two different woven materials in key areas; thin stretch Nomex® for comfort and mobility as well as a double perforated Nomex® for increased breathability and ultimate comfort. The minimal seams are stitched flat with thin specialized thread for added comfort. All Shield RW-9 pieces are treated with Sparco X-Cool Silver which draws heat from the body surface to cool the driver. In addition to cooling the driver, X-Cool Silver treatment has an anti-bacterial effect.