Traditional spa cover design

Open skirt hinge section has extensive heat loss shown by the bright orange spots. The generally sub-standard material used to build these covers does not prevent major heat loss in the hinge itself, as is evident in the bright orange line.

AccuLok™ patent pending design

The seamless, one-piece design heat shield wraps the spa perimeter tightly to prevent heat escaping from the hinge and seam. The entire hot tub cover shown above is dark blue indicating no "hot spots" of escaping heat.