Donut foam fenders is type foam filled marine floating fenders manufactured in donut hollow ends with cylindrical body, installed and fixed onto a stationary monopile to protect vessels like dolphins by turning and eliminating shear forces when large tidals or extreme fluctations occurs. Dont fenders is constructed of bearings, polyethylene PE foam core and polyurethane elastomer skin, float up and down along with the water line. Donut fender can rotate freely upon contact with ships or vessels, adjusting with changes of water levels to allow ships go into proper position.