The Dayco Top Cogged Accessory Drive Belt is designed to improve circulation around the belt, making it operate cooler and longer. It features three plies of neoprene impregnated fabric that resist heat, oil and grease and a specially formulated treatment of the polyester cord that provides strength, stability and reliability. This belt meets or exceeds SAE J636 and SAE J637 specifications and provides greater flexibility for a smoother ride. FleetPride is your First Click in Heavy Duty®.