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Through the use Alpinestars' proprietary Lenzing FR fabric
Covered in the highest quality suede leather
Bolt-on style features the standard 6-bolt steering wheel bolt-circle (compatible with Sparco and Momo Wheels) and a matching 6-bolt base that can be bolted to your favorite steering wheel hub adapter
Built with reinforced fronts
Since 1929
Sparco RW-4 Fire Resistant Racing Boxers Color_Black/Green/White Through the use Alpinestars' proprietaryStay confident and protected while racing in the Sparco RW 4 Race Boxer Briefs. These undergarments are FIA 8856 2018 homologated for safety and provide essential support without front stitching. Crafted from a comfortable mix of 55% modacrylic and 45% cotton for maximum comfort.
