A golf training aid constructed of flexible material that stretches when deployed and maintains tensions along the wearer's upper and lower arm including a shoulder harness including a first shoulder portion and a second shoulder portion, the first shoulder portion including a strap that is fixedly attached to a back portion of the first shoulder portion and can be detachably fixed after passing around a body of a wearer to a front portion of the second shoulder portion to maintain the shoulder harness on the wearer while the wearer executes a golf swing and an arm extension attached to the second shoulder portion, the arm extension including an upper attachment portion, lower attachment portion and wrist portion, the upper and lower attachment portions can secure the arm extension in place at upper and lower portions of a wearer's arm to maintain the arm extension over the elbow of the wearer.