Materials: multi-layers of high-density,closed-cell polyurethane foam.

Function: defreeze against cold climate, maintain water heat, reducing the time and energy of heating.

Benefits: Benefits:low operating costs,eliminate heat loss, reinforce the bearing of spa.

Studies have shown you can reduce your monthly operating costs by half with the use of a sufficiently insulated shell and a cover whether indoor or out.It is an excellent way to insulate and support the hot tub shell.