Dayco was the first to develop the raw edge sidewall construction V-belt, which facilitated controlled slippage around pulleys.

Raw edge construction is combined with the Dayco patented cogged top design to ensure the top performance that today's vehicles and drivers demand. The Dayco Top Cog V-belt delivers more flexibility, and increases airflow around the belt, so it runs cooler and lasts longer than competitors' V-belts. Three plies of neoprene impregnated fabric resist heat, oil, and grease, and a specially formulated treatment of the polyester cord provides strength, stability, and reliability.