HEAT Cotton Insert & Pillow Set™Sweat it out in ultimate comfort with the all natural HEAT Cotton Insert & Pillowcase Set. The ideal complement to your HEAT Infrared Sauna Blanket, its highly absorbent, rapid drying design pulls moisture away from the body, radically eliminating excess sweat. Its so effective, you might think youre not sweating at all (believe us, you are). Meanwhile, a breathable blend of cotton and bamboo drapes the body in a light protective layer. So you can zip