Premium aramid belts use very strong synthetic fibers embedded in the rubber to reinforce the CVT belt. The most widely known aramid is
KevlarŪ by DuPont.
The aramid fibers used in CVT belts have very good resistance to abrasion and virtually no degradation due to heat
which makes them ideal for use on scooters, go karts, and mini bikes that have a continuously variable transmission (CVT).