Severe Duty belts made with Aramid fiber, which has the highest tensile strength available. It eliminates stretching, breakage, and cord separation. The latest rubber compound technology available for increased adhesion to clutch faces and longer life. Designed in cooperation with Glenn Erlandson, CVT clutching guru. Certified to be within OEM required manufacturing spec. Exceeds OEM belt quality in cord strength, compression side load capabilities, heat resistance up to 300 degrees, and stretching resistance. GBoost Technology logo/part numbers on the belts and belt sleeves to ensure the correct fitment and the quality you paid for. GBoost Technology drive belts are made in the USA.