The Alpinestars KX Karting Undershirts have been specially developed for kart racing performance with a polypropylene fabric construction Engineered for superior body temperature regulation. By enhancing comfort and performance through improved wicking performance, temperature regulation, and muscle support, the KX Top greatly improves the driver experience.
TO ENSURE AN ACCURATE FIT, use this chart to order your correct helmet size. Carefully measure around your head, above the ears. Take the measurement, in inches or centimeters, referring to the sizing chart below for your correct hat/helmet size. Helmet must fit properly for optimum performance. Don't guess your size. Helmet must be securely and snugly fastened before engaging in any activity.