Abstract: The present invention relates to an improved heavy duty mud flap. The improved mud flap includes metal segments on the outer edges of the mud flap that allow movement of the mud flap in one direction only. The segments are connected by rods which contain a plurality of alternating rubber discs and spacers between the outer metal segments. The rubber discs and spacers freely rotate about the rods, such rotation helping to reduce snagging of the mud flap on objects or tires. The series of rubber discs and spacers also act to break up spray generated by vehicle tires coming in contact with wet conditions. Finally, a mounting device is included to attach the mud flap to a vehicle frame.