KEVLAR© IS A HIGH STRENGTH BELT THAT CAN WITHSTAND HIGHER SHOCK LOADS, REVERSE BENDING AND TWISTING OVER LONGER PERIODS OF TIME. THE STRENGTH COMES FROM THE CORDS, WHICH IS A HIGH TENSILE STRENGTH ARAMID FIBER. THESE BELTS USE A SPECIAL OUTER DRY WRAP, WHICH MAKES THEM SUITABLE FOR CLUTCHING APPLICATIONS, LAWN MOWERS OR ANY DRIVES WITH FREQUENT STARTING & STOPPING. -PIXB89K>